I took the automatic test many years ago, and then a mototcycle one, then the manual one (that last twice as I failed the first time due, of course, to some other IDIOT on the road
who was signalling left and carried on straight ahead).
The taking of a test on an automatic still does NOT give you the right to drive a manual car on your own, although your resulting full license "also acts as a provisional license for any other group that you can legally drive". I think the separate tests came in during the 1960s.
Links?
http://www.dvla.gov.uk contains much more up do date information than my memory, and there are some useful threads here a page of two back.