Gosforth Amateur Dramatic Society (Cumbria, UK, not Northumberland)
The Amateur Theatre Network - a mine of information on the subject.
An international database of playwrights & their websites offering production & publishing opportunities
Apparently a specialised route into Amazon.com. Can be slow to load, with a lot of clutter on the home page, but lists authors clearly and gives interesting biographical information.
For purchasers outside North America, the local manifestation of Amazon would presumably be more appropriate if it has the item.
A portal to a wide range of theatrical service sites, conveniently categorised.
A database of plawrights and plays in English, published or produced since 1956.
A general directory with many categories including performing arts.
An excellent theatre in a magnificent location, with a year-round programme including a rotating repertory of up to six varied plays and other events from May to mid-October.
William Malone's autograph account of the Battle of Mons in World War 1, with a more legible transcript.
Parish web site