For somebody that thinks that social distancing cant be maintained underground, so people shouldn't be caving during Covid, it appears that Mr Grass isn't very good at social distancing himself (even if he is disguised as a Scot).
We at Dankness Below expect more of such stalwarts of British caving, especially when in the public domain.
https://ukcaving.com/board/index.php?topic=26463.0