Hi Mark,
I'm also from the UK, there are a few Brits here. If you search through the existing threads you'll find loads of posts regarding thiaminase. Or try this link
*Garter Snake Home Page - Alan Francis It's a good site and there's an interesting "recipe" that's got to be worth a try.
Welcome to the forum, I love it here! By the way, you can change your Location flag, which is currently Stars and Stripes!
James.