oh, I definitely see what you mean about the chain places in the UK, but I find there are PLENTY of unique places if you just look

I used to live near Broadway Market in East London (still not that far away, actually), and it's FANTASTIC - in one short stretch we had Russian (Little Georgia - now moved down the road a way), Argentinian (Buen Ayre, with a proper open grill which is, or at least was, the only one of its type in London; the place has been packed nightly since it opened), Mediterranean (Cilicia - there's one other in Stoke Newington, so may technically be a chain, but does wonderful Turkish and similar type food, and has beautiful gourds hanging from the ceiling) and Indian (Joy); there's a great gastropub (Cat and Mutton) and a brilliant taverny type pub called the Dove, with an amazing selection of Belgian fruit beers and a menu of mixed traditional (bangers and mash, burgers) and Thai... and of course there's the ubiquitous fish'n'chip place, and a kebab shop, etc
I know similar places in Stoke Newington - the Blue Legume, just for starters - and loads of places in Soho as well... and I've been to excellent places with friends, but they were more local to them so I don't remember names and locations off the top of my head

and I've managed to live here almost four years and never step foot inside a Maccas, or a Burger King, or an Angus Steakhouse

been to Cafe Nero on and off, and Starbucks occasionally - mainly for the frappucinos - but generally I can find somewhere unique and different a few minutes' walk away so if I do go there it's usually by choice