British curry eater here. I have a curry cookbook that identifies the regions of Birmingham where the dish was believed to have originated. The classic Balti is widely understood to have been developed to meet the tastes of the British

That British curry is exported to India would certainly suggest that it's something different :)

Old-school jokes about British food aside, Britain now has a fantastic food culture and the range of cuisine available in even quite small towns compares well with a large chunk of Europe. I think there's a willingness to experiment and innovate (both in terms of the providers and also the diners) that some cultures with very strong food traditions struggle with. I won't go on again about how disappointing my experiences in Naples were, but it opened my eyes to how fortunate I am in the UK.

British carbonara tends to be a bit different from that in Italy too.