I know where you are comming from, I also was brought up in a northern town where one side of the town was white and the other was Asian and rarely did the two ever meet. It might be the same town.
Currently I' in Wolverhampton and, like London, it is both diverse and people rub along OK. No one bats an eyelid if I buy samosas froma sweet centre. I know if I went in to a sweet centre in the town I grew up in I would be treated politely but I'm sure when I left I would be talked about because that's not what white people do there.
I year or two ago I went into a pub about 5-6 miles outside Wolverhampton and we got chatting to some locals. Everyone seemed nice until they asked where we were from, the locals then expressed lome racist comments. It knocked me for 6 because I just did not expect it
I worked with a nurse who's husband is from NI, she's Indian and when she first went to meet his family she was stared at in the street becuase she was so rare. It wasn't mallice, just the first brown person most people had seen (this is going back 20 years).
So.
Check out the area, go visit and see how you feel. Do you feel comfortable?
The areas I was looking at were the villages of Higham, Fence, Barrowford, Roughlee, Clitheroe, etc. I'm assuming they're no go?
I've just gone back over the thread before posting an answer.
Definitely spend some time there, my gut reaction is to say 'no' to you. I only visit my dad occasionally so things may have changed.
The last time I was in the area I went shopping and I wqas being served by a charming young woman who happened to be wearing Hijab. She had a beautiful hairslide/pin securing it nad I said how much I liked it.
Her reaction was initially to pause and then say thank you. I couldn't understand the pause. Then it hit me, white people there dopn't say things like that. Mostly the two communites live parallel lives.
Wow that's a ramble and not much help.
Basically I think you can face racism anywhere, some places are worse than others. I tend to find cities less racist and places where there is a mixture of backgrounds the least so.