Jeff de Bruges?

I'm surprised. This French chain (nothing to do with Belgium) is pretty much unknown in the UK, I only know it because it has branches in Spain. Their chocolates are completely unmemorable to me - but I do have lots of happy recollections about their ice-cream!

Leonidas is OK, but European Godiva is better.

Out of JdeB and Leonidas I'd say the latter... but then if I was in the same position I'd go for neither and would be debating between William Curley's Chocolates and Paul A Young's... mmmm! Salt caramels!