From BGA laws and Rules 2010 edition (the latest and current version:
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“THE LAW
OPERATIONAL REGULATIONS
ANO 2009
3.1
(b) Pilot/Owner maintenance including daily inspection (DI) must be carried out and certified in accordance with EU regulation
2042/2003 as amended. Pilots carrying out maintenance must
hold a valid pilot’s licence (or equivalent)
[snip]
3.4 All gliders operated from BGA club sites shall be inspected before flying on each day. Club gliders shall be inspected by club approved persons who must sign that the glider is serviceable before it is flown on that day.
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As stated above, “Bronze” is taken as the equivalent of a licence. There is a formal exam for Bronze, though again
AFAIK it does not include details of how to do a DI, and certainly does not have a practical DI examination.
Club pilots who DI club gliders are often pre-Bronze but are then presumed (
AFAIK) to be doing so under the supervision of a qualified pilot or instructor.
Chris N.