Boudicca - Was just checking it out, yes, Millain Tea, Mullein (Verbascum thapsus). Dried mullein leaf suitable to make mullein tea.
I put in a Google search and came up with a raft of hits, and yes, is available UK and on-line: here's one UK site
http://woodlandherbs.co.uk/acatalog/ilm.html#a245 £1.20 50gm. One can usually order over the telephone as well as...
Interesting that it is also good for arthritis. Good info.
Molly
Keeping on Keeping on