The CAA has issued a further exemption, extending the validity of ratings and endorsements on UK PPL and NPPL licences, to 22nd November 2020 subject to ground endorsements by instructors or examiners.
Not just 'ground endorsement':
[…]have received refresher theoretical knowledge and flight training from a CRI or FI applicable to the class[…]
But the explanatory note states: Recording of the extension of the recency validity period, should besubject to a briefing
that can be conducted via preferably an electronic audio-visual link
or telephone or in person maintaining social distancing requirements, covering
theoretical knowledge and flight safety subjects.
. That makes sense! Perhaps the word "safety" was inadvertently omitted from the main text.
Also para 5 of the main text has no context - it's just a list, no explanation of what the list is there for. Methinks some redrafting is required!