I don't know what the BGA uses, but the Soaring Association of Canada teaches the following: SWAFTS
(1) Straps secure
(2) Wheel down / Water ballast jettisoned
(3) Airspeed (trim set for desired approach speed)
(4) Flaps
(5) Traffic (check for conflicts)
(6) Spoilers (check operable)
BTW, the pre-takeoff check is CISTRC (i.e., "Sister-C")
(1) Controls (free, full and correct)
(2) Instruments (altimeter and electric vario set)
(3) Straps (secure)
(4) Trim (set in takeoff position)
(5) Release ([correct] tow rope hooked up and tugged to ensure secure)
(6) Canopy (closed and locked)
Hope that helps.
MLS-12D
