The PFA have written a
formal letter of complaint to the Department for Transport.
The letter regards the structure and content of the CAA's Partial Regulatory Impact assessment used as justification for mandatory Mode S, and is well worth reading; it is only two pages.
The main PFA Mode S page is
here and contan their
main response letter (31 pages), which is also an excellent document.
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Further edit to add links to the
BGA response and their
covering letter.
This is a quote from the latter:
It is clear to the BGA that the RIA author now realizes that there are serious deficiencies in the
proposals. The BGA believes that the published RIA provides an utterly inadequate consultation.
The BGA looks forward to receiving a response from the CAA detailing how proper consultation
with gliding will be conducted that takes the realities of recreational aviation into account. The
BGA looks forward to assisting the CAA in that process going forward.