[enriquto]

> So in the UK if I walk to a market stall with money in my hand they are free to refuse to sell to me,

But I do not understand how can this be enforced. If for example you are gay and are refused service, can't you claim that it is due to your sexual orientation? Conversely, if the shop wants to expel you because of illegal reasons, can't they always claim that it is due to some other, ridiculous but valid reason?

[mytailorisrich]

Yes you can obviously claim that, and yes they can obviously claim this was not the reason.

Then it's the usual job of the courts to try to uncover the facts.