She's early 20s and I'm 30, have only worked together for around a month.
I live in the North and my job is in a town that has quite a distinct accent, most of my colleagues live in the town and have that accent but I don't and live further away.
I haven't got a strong northern accent but it isn't 'posh' either.
Anyway once at work I said something, a slang sort of word and she went "Oh I thought you'd be too posh to say stuff like that."
Another time we had a crazy situation and I let out an "oh shit."
She said "I never thought I'd hear you swear, I thought you were too posh for that."
I've just laughed it off but it's strange she says that, though it doesn't matter at all what she thinks.
Sometimes I've thought she likes me and other times, no. It's a late shift which not everybody wants to do and maybe she just couldn't be bothered that day. But one night she seemed fine then I heard her saying to our colleague, "are you sure you don't want to do my shift for me? I'll do yours tomorrow instead?" It was just me and her on that night.
Then she was quite frosty, only speaking to me if I spoke to her first and giving one word answers. I asked her how her shift had been with a different colleague the day before and she said "It was fantastic."
But then other times she's friendly and chatty so I'm not really sure.