If account has GBP (£10) and EUR (€50), does the GPB all get used up and some EUR get automatically converted to GBP when making a payment in GBP greater than what one has in GBP (£30)?
No, you have to have sufficient funds on single account
Thanks, there are sufficient funds (£10 + €50) to cover £30. If there was only EUR, wouldn’t I be able to convert to GBP using Mastercard rates?
You understood me wrong.
If you want to spend 30 GBP and you have 10 GBP in your wallet- 10<30, so it won’t pass.
Second step 50 EUR> 30 GBP- it’ll pass.
Thanks for your help.