Anglo-French successes:

Vanilla chestnut spread / Créme de marron de l'Ardèche vanilèe.
Concorde / Concorde.
First World War / Première Guerre mondiale

OK, running a little thin on ideas now.

Even the short list above is very questionable. WW1, although we won it, shouldn't really be there as is any war a success? So that just leaves the first two.

Just checked again - although it has dual labelling, it seems to be a completely made in France product.
Oh well.

Anglo-French successes: Concorde

Surely there must be more to add to the list than just Concorde. Oh - Channel Tunnel - and it's just made a profit!