forget;
Also from the link, the following recommendation (of a few):
Safety Recommendation 2008-074
It is recommended that the Federal Aviation Administration and the European Aviation Safety Agency review the certification requirements for automatically stopping flight recorders within 10 minutes after a crash impact, with a view to including a specific reference prohibiting the use of ‘g’ switches as a means of compliance as recommended in ED112 issued by EUROCAE Working Group 50.
As I say, the presence of a 'g' switch was a surprise to me, although I can see the reason (but perhaps not the need) for same. This is, as your quote from the report states, not a 'g' force normal to one plane either - it is 45deg to the vertical/longitudinal axiis and is the sum of 'g' forces in these two axiis. I can see the reason for the AAIB's concern.
Darn poor day when you don't learn something...