I had no problems in France last year - Cooperative Bank
But when I was in Dubai last week the little fekkers would not work, until I made a VERY expensive 10 minute phone call to the bank.
I was then informed that we should always inform our bank of any travel. Turns out that the UAE is a blackspot for card fraud
How ironic, I was in Dubai last week too and my Nationwide card refsued to allow me to take cash out. It would however work for purchases using Chip and Pin
Ironically, my Barclays card did work at cashpoints!