for some though, the city is now synonymous with the hugely popular channel 4 sitcom, derry girls.arry an orange man, michelle. that's a pity. because i think there's something really sexy about the fact that they hate us so much. the comedy is a reminder of how much has changed. the population of northern ireland is smaller than west yorkshire and yet it is here that almost the entire argument is being fought, an argument that involves three borders, northern ireland and the republic, northern ireland and great britain and great britain and the republic. this is the awkward one — the famous irish border. this bridge marks the divide between the north and the republic. and you can see the problem. it's open — too open to now obstruct. and there's an awful lot of it. 300 miles, over 200 crossing points. i remember when there was barriers across here. barriers across here? yeah. you can remember that? och aye, sure. yeah. so, this road was shut? this road was closed altogether. i don't think there's any call for a border. if you put a border in, they'll blow her up. do you think they