[vinylweatherman]

I have had a good look at the banking page. It seems very detailed, and makes it clear that all play and wins are in dollars, and deposits in other currencies will be converted into dollars.

On withdrawal, the following aplies:-

All players using € (EURO) outside the Eurozone (12 countries in which euro is the official currency) or £(Great Britain Pound) outside the United Kingdom will be charged an additional 5% fee on every approved withdrawal request up to a maximum fee of €500 or £500.

This simply mentions where you are when you play. If you register with a home address outside the UK, but deposit in pounds, this applies. Although under the overnight express heading, there is a gap which looks like it is a "special general note", but the writer has forgotten to precede this paragraph with this as it has for the others.

There is NO POUND EDGE involved here either, so there would be no benefit in depositing in pounds if you could deposit in dollars. It is possible that the 5% is, in fact, due to exchange rate charges, which a casino would normally cover itself. I suspect they want players to deposit in dollars, but are prepared to "eat" the exchange charges for UK and European players.
Now, if this 5% turns out to be in ADDITION to exchange rate charges, that is too cheeky to be allowed to pass. I think someone with connections should try to get an explanation of what is behind this term, as it isn't "bonus abuse" through currency edge.