Can anyone please tell me where I can buy Diastatic Malt Powder in the UK, preferably Hertfordshire.
find any you can alwasy make your own. Sprout some rye berries for 4-5 days and then dry them out in the oven at a temperature that never gets over 150 F. When dry thend grind them up in a coffee mill. Works great. Plus on day 2-3 you can use some of the sproutsin your bread too. Here is a post on how to do it using a mix of berries
It is very easy to do yourself if you can't find any.
Thank you for that but where on earth do I find Rye Berries!
But try first at your pharmacy or Reformhaus specialty foods. Or special foods section of the grocery. If you have a home brew shop they would also carry it. Be sure to ask for the active variety which is not as common as the darker caramelized non-active malt flavoring. General rule is, that if it doesn't say on the package, it is not active. Diastase (Amylase) is the sugar you're looking for.
I buy from the Hop Shop, here is a link for diastatic malt: http://www.hopshopuk.com/products/view/922/beer-making/ingredients/malt-extract/edme-dms-1-5kg-tin
I buy my Red Rye malt from them. Service is first class; they are based in Plymouth