The guidelines for YOU magazine are here. They want 1,500 word stories which are suitable for male and female readers in a large age range.
They're a South African magazine so it might be a good idea not to set too many stories in the UK. Consider changing place names and the currency. I can't promise that will help, but it's something to think about.
Some stories are like the sun - they can be set anywhere. (Sorry - but I got up really early to take that picture so want to make use of it)
I do know YOU will accept work from British authors as they've just bought one of mine. They pay by electronic transfer which makes things easy.
Have YOU ever subbed to them? Any luck?