I have just done £105 in Euros (Euro 123) to my UK-based MBNA credit card account using MBNA's IBAN.

Let's see:
1. How long it takes to hit my credit card statement as a payment in
2. How much hits my card statement
3. What is therefore my total cost including MBNA's FX charge (actually Co-Op's, as MBNA bank with them)
4. Whether I get the 5,000 points as this was a foreign currency payment to a UK destination, albeit using an IBAN

Unfortunately we won't know about 4 for a while! But hopefully if they do hit they hit before Dec 31st so others can take part.