this is bbc news, the headlines: prosecutors investigating standards of building construction in turkey have issued more than a hundred arrest warrants in the aftermath of the earthquake disaster that's cost more than 28,000 lives. thejustice ministry has also ordered the ten affected provinces to set up earthquake crimes investigations departments to collect evidence. the pentagon says fighter aircraft have been sent to investigate a radar anomaly detected in montana. no object was found but officials are monitoring the situation. earlier, a us fighterjet shot down an unspecified object over northwest canada — the second such incident in as many days. a committee of mps here

in the uk has been highly critical of the chairman of the bbc, richard sharp. they accuse mr sharp of an error ofjudgement for getting involved in facilitating a loan to then prime minister, borisjohnson, whilst applying for the chairmanship of the bbc. now on bbc news, powering ukraine. russian missiles and drones rain down on ukraine's civilian infrastructure, causing untold damage. this is ukraine's energy war, a constant battle for heat and light, with an army of engineers racing to keep the country connected.

for ukrainians, it has been a winter of darkness and uncertainty. how does a country respond when the stakes are so high? if the power system collapses, that would mean the suffering of tens of millions of people during wintertime. we cannot allow that, not on my watch. we follow the teams fighting this war. what the missiles destroy, they rebuild, in places

where people are living on the edge. this power plant in central ukraine has been hit repeatedly. it's a huge place, but this is what well—aimed russian missiles have done to the country's infrastructure. missile fragments litter the place. for security reasons, we have been asked not to identify the plant or its manager. so what happened here?

this is where electricity begins its journey from the power plant to the world outside, the first links in a complex chain. since october, moscow has been working systematically to sever those links, to break

the system into pieces, to break the will of the people. every corner of this huge complex bears the scars. while the threat still exists, not everything will be repaired.

millions of people depend on this coal—fired power station, built in the soviet era, its great turbines turning away at the heart of ukraine's sprawling power network. fantastic machine. the system now generating half as much electricity as it did a year ago. the staff here know they are in russia's sights. ihor is the plant's chief technician, on duty the morning of the first attack. when he arrived here in the main control room, he found a chaotic scene.

so the whole power station is run from this room. did all of this get switched off? it has been weeks since the last attack here, but this morning the

alarms keep coming. siren. so there's the siren. we had been expecting it this morning. we have to get out of the turbine hall and head straight for the shelter. incoming missiles have been detected, flying towards ukraine from the south and east. there is time to take cover. on days like these, hours are spent underground. anxious moments as news comes in of a fresh wave of attacks. their colleagues at a power station in the west have taken a direct hit. they know this could have been them, and closer to home, word is spreading of something much worse. across town, the tragedy

is unfolding. a missile has struck an apartment building. the rescue effort is frantic. dozens of people have died here. the missile that did this was huge. designed half a century ago to destroy aircraft carriers. it was almost certainly aimed at the power station. some of russia's attacks are accurate. many are not. russia's assault has brought death and darkness to ukraine's cities. the nights are long and cold, the power cuts frequent. the whole nation plunged into a world of adjustments. for david, not yet two,

it is mostly a game. that's how his parents prefer to keep it, especially when sirens wail and missiles fall. it's 8:30. a power cut is coming. it's time for bed. here we go. yes, yes. there we go, it is 9:10 and a few minutes late but the power cut has begun. after months of this, the fear and the novelty have long gone. this is how millions of ukrainians have learned to spend the evenings — unfazed, organised.

this war on energy is notjust about ukraine's power stations, it's about the entire infrastructure, the grid that keeps this vast country with electricity and heating. and it's that grid that has been hit over and over again since october. we're off down a rather bumpy road see a piece of that grid now. and again, we cannot tell you where it is. this is serhii's substation. the place where he has worked for 30 years.

since september, he has watched it be demolished, bit by bit, six separate attacks. four months ago, he saw a kamikaze drawing destroy the control room and his office, knocking the whole substation off—line, cutting power to millions of people. the attackers knew exactly what they were doing.

the substation�*s 750 kilovolt transformers won't be easy to replace. they weigh 300 tons and take months to produce. only three or four countries in the world make them. one of them is russia. ukraine is scouring the globe, looking for substitutes. we are far from this war�*s frontlines but everyone who works here feels like a soldier. in this forest of machinery, there is a quiet, steely determination. do you feel angry? for who?

we travel on south, towards frontline communities under regularfire. ukraine's battalion of engineers racing from one repairjob to the next. speaks ukrainian this happens all the time, volodymyr tells me. we're on our way to a village shelled just last night. the power lines are down, again. the repairs won't take long but the men know they will be back. the battle to keep ukraine connected takes many forms — repairing wires, diverging power, concealing what is

and is not working. it's a constant struggle, fraught with danger. distant explosions in the nearby village, the sound of artillery has the mayor ducking for cover. how long do you think you can carry on living here in this situation? or do people want to leave?

in places where the frontlines have moved, there's other work to do. here, teams are busy reconnecting towns and villages cut off behind russian lines for months. where the army has been,

the engineers must follow. speaks ukrainian fedir is another veteran. his home town is under regular attacks are his wife and grandchildren are living in poland. he is out in the field every day. pylon by pylon, cable by cable, connections are re—established. these are battered places, scarred by recent conflict. fresh graves speak of long, difficult months and long, difficult lives.

the engineers wait as emergency teams go ahead, inspecting the ground, looking for discarded weapons. it's slow, painstaking work. how long do you think it will take to fix everything?

and while the country waits, it simply copes. city streets echoing to the sound of generators. mobile phones lighting the way. life somehow continuing. and a mounting sense that ukraine has, for now, weathered the storm. this battle is finely balanced between russia's ability to inflict damage and ukraine's efforts to repair it, to give people just enough power to get by. those who run the grid have no illusions about the struggles ahead.

russians failed to take down our system or to cause big disturbance in our system. having said that, unfortunately, they are gradually destroying very important items of equipment in our grid which takes time to be restored. and yet, despite all of this damage, as you travel around this country, it becomes obvious that ukraine is not on its knees. we were prepared and we were very resolved to win this particular bout. we have no other way than to win because if we lose, if our system collapses, that would mean suffering of tens of millions of people during wintertime.

we cannot allow that. when i am asked this question, i often say, "not on my watch". and if somebody told me before that our power grid could stand like 1000 missiles and drones and still run and still deliver power to consumers, i would probably not believe it but now, we know that we are resilient and we are much more ready now for the new attacks than we have been on the 10th of october. russia thought it would break ukraine but its campaign isn't working. half the grid may be in tatters but in helmets and body armour, these men are keeping it alive. the war�*s terrible cost

is evident wherever you look. the sacrifices have been immense. but power, the lifeblood of a nation, still reaches across the land. much of the country was cloudy on saturday — rather a grey, dismal day. however, the sunshine did break through across north east scotland and north east england

and we saw temperatures in the low teens. part two of the weekend, i think we should see more sunshine around across northern and western areas because we'll have more of a breeze to break up the cloud. but earlier sunday will be rather grey with this blanket of cloud. and by around dawn, for most of us, temperatures shouldn't be any lower than 3—6 celsius but where we have the odd cloud break, there could be a few frost pockets here and there. so, for sunday, then, we've got high pressure still dominating the weather scene, keeping all weather fronts at bay, so it's staying largely dry and we're in this mild air mass, our air source coming in from the south. so, we start off rather grey for this morning but as we move through the morning, more of a breeze across the north and the west. that'll help break up the cloud, so we should see more sunshine — scotland, northern ireland, north west england, wales and south west england. light winds further east mean we'll hold on to the cloud, so i think rather grey for the eastern half of england but it will be breezy in the north—west of scotland, where we could see some of the best of the sunshine. and a mild day to come as well — temperatures 10, 11, maybe 12 or 13 degrees in the sunniest spots. through sunday night, we'll hold onto the cloud across more eastern areas

but with more cloud breaks further north and west, then, this is going to be a recipe for a slightly colder night, i think. where we have those clear skies, then we're likely to see some frost, maybe a little bit of mist and fog, too. so, as we head into the start of the new week, for monday, we've still got our area of high pressure with us but weather fronts will be slowly pushing in from the west. they won't really arrive until late on tuesday and into wednesday to bring a change to our weather. monday, anotherfine and largely dry day. a lot of cloud towards the east of england. elsewhere, we should see holes breaking that cloud to allow for some sunny spells. and again, another mild day to come. temperatures in double figures for most — 12—13 warmest spots in the sun across the south. then, into tuesday and beyond, we start to see weather fronts making inroads. i think from wednesday onwards, this is where we'll start to see the weather turning a bit more unsettled with low pressure bringing slightly stronger winds and outbreaks of rain at times. so, tuesday, another fine, dry, sunny day. very mild once again. and then, from wednesday onwards, we'll start to see things turning a bit more unsettled with rain at times

but even then, it's still going to stay mild.

good morning. welcome to breakfast with ben thompson and tina daheley. good morning. 0ur headlines at 6 o'clock: almost 30,000 people are now known to have died in the earthquakes in syria and turkey but the un warns that figure could double. celebrations as a young girl is pulled from the rubble. but almost a week on, hopes fade that others will be found alive. bbc chairman richard sharp is accused of making "significant errors ofjudgement" by mps for not declaring his involvement in helping borisjohnson secure a loan.