A few years ago I was looking for such a thing.
Imagine a payment service linked to a debit card, ideal for hiding money

Customers could pay you and you just draw the money out of an ATM. But the UK's strict mony laundering rules will not allow such a thing.
Off shore accounts/companies which do such a thing. Your off shore company invoices the company, they pay into your off shore account and then you can spend the money on a Credit Card linked to the account.
I would never condone such practices and the all but 1% of these loopholes have been closed down anyway.
Another way is to import all your goods via an offshore company. Imagine your offshore company buys 5000 ipods from overseas at £100 each. Your offshore company then sells them to your UK company for £148.99 each.
In the UK you sell them for £149.99 each.
The benefit? Answers on a postcard
