I'd never heard of CEoGB until this morning and some of its aims seem virtuous enough, although maybe others less so.
Anyhow, in the first photo they are riding on a pavement (no shared facilities there) although the traffic can only be described as light.
In the other photo, as you point out, they are again disregarding the HC. The right-hand turn is after the pedestrian lights meaning they will have to re-enter the traffic flow at a pinch point, or dismount (hopefully) to cross on the crossing.
Neither photo shows the sort of behaviour I'd encourage. Perhaps these ambassadors carry diplomatic plates rendering them immune from the rules of the HC? Helmets? no issue there IMO.
In my experience, the UK offers cyclists a good deal; the very reason for this ambassadorial excursion was to inspect the Two Tunnels project which ends a half-mile or so from my house.