you would have to either find an agent (Someone that will collect the money in the UK for you) or setup an account with western union in the UK, UK has a very different view than their counterparts in the US regarding gambling HOWEVER keep in mind that western union is itself a US based company and might not like you using their financial instruments for running gaming transactions
Moneybookers is like a paypal/neteller, I haven't heard good things about their customer service, its mainly oriented towards european customers
I have heard good things about lateral payment systems, they are credit card processor, APPARENTLY they have been around for quite sometime
Also wirecard from Germany are excellent HOWEVER if you say you are not gambling and you are............................they will NOT like that