Originally Posted by
BruceyBonus
If I give my employer a receipt in any other currency, I get refunded in GBP at some dodgy* exchange rate [...]
Are you not able to enter the amount actually charged to your card on your expenses claim? Along the lines of "ABC Hotel, invoice amount EUR 130, amount charged to my Visa 1234 GBP 96.37".
If not, I can see the attraction of DCC for anyone who is, quite reasonably, more concerned about not being out of pocket than about their employer not being out of pocket.