Thanks for the fast replies (which is more than I can say about oxo).
I gave up and tried using their online form to contact them, only to be required to give them my home address and surname etc.
I rang the help line and didn't get anywhere (as the service was unavailable). I rang the head office, and no-one picked up.
The premier foods link on the oxo website...is dead.
I think premier foods are having some "we're all assholes and don't want to be contact" issues
The thing is they are suitable for vegetarians, but the e number information (for E635, the one mentioned above) I manage to get only mentions meat, and no other sources.
Oh this is all highly confusing.
Head office finally picked up, and put my through, currently on the worst hold I've heard before. Every 5 seconds !we are sorry to keep you waiting...blah blah blah"
And in between that the same 5 or 6 piano notes is repeating.
But, I persevered, I got through, and I spoke to someone:
"It says it's suitable for vegetarians..."
He took my name, number, and they get back to me (apparently).
I think they just hate their customers personally. And judging from their past behavior (terrible websites, unreachable call centres) I will guess that they won't get back to me.