Thank you all for your comments and help (and sorry not to have come
back earlier - been in bed all week with a temperature). Actually I had
tried googling but didn't seem to come up with any suppliers, only
information.

Hadn't thought about Chiltern Seeds - I'll give them a try.

And thanks to Bill Grey who sent me a lovely photo of a carpet of
Ramsons in the Swansea Valley.

David

--
David Rance writing from Caversham, Reading, UK
http://rance.org.uk