our west of england correspondent dan whitehead reports. >> once a week, holly has to scrub the molder walls with bleach. keeping the damp and cold away, in this old miner's cottage, it is a constant challenge. >> as you can see here, mold starts here, on the door, all around, it's bad in the bedroom. i'm show you. >> with no main gas available, she's at the mercy of rising electricity bills. >> i can't afford to heat my home. not properly. not to keep the mold at bay. not to keep my feet from not going numb, so i can't sleep at night. and worrying, it is debilitating, i've been there, with electric providers. i'm tough and many aren't and that's why we are talking today, to look after the vulnerable here. >> holly isn't alone. 47% of homes in cornwall are off grid. the gas pipes simply don't reach down here. it means families are reliant on oil, bottled gas, and wood, to heat and cook. the problem is, those sources aren't covered by the new price cap. and the war in ukraine is pushing up the cost for these communities. >> hi, how are you doing? come in. >> robert and lorraine lynch