[Bossman]

Yes. They will do a credit check for that. I only use my Virgin sim for voice and data when I am in the UK. Outside the UK, I use it only for data because they charge the same for GPRS usage regardless of roaming or not. On my recent trip to UK, Amsterdan, and Nigeria, I used my virgin card extensively for data. BTW, Nigeria is not even on the list of prepaid roaming countries. It is listed for direct debit though.

Roaming with the virgin sim for voice, even with direct debit, is somewhat expensive though. You may want to look into the international sim such as the IOM sims, that give you a UK number.