I have a letter from Dr Jeremy Hodge, then CEO of BASEC, written about ten years ago, confirming to me that FP200 Gold is fully approved for general wiring use in homes and commercial premises. I have also discussed the issue with him several times. The foil is an extension to the CPC (I agree it is not the actual CPC) that has been fully tested to trip a 100 mA RCD (I think it is OK up to about 1 A) if the cable is penetrated by a nail or screw and the phase conductor is touched by the screw. So, as long as the installation is RCD protected, the places the cable can be run are reasonably unrestricted. The reason CY and SY and similar braided cables do not comply is that you cannot guarantee that the nail will make a good enough contaict with the braid as there are 'holes' in the braid knitting.
In November 2017, Dr Jeremy Hodge stepped down as CEO but remains in the business as Technical Director to enhance BASEC’s technical leadership in cable testing and certification, supporting Tony. Jeremy also remains as a Board Director of British Approval Services for Cables.