Thanks both. Went back today and spotted the lay-by with the gate. Decided to park as for Black Rhino and walk over the top rather than block it. That said, it didn’t look like the gate went anywhere, so not obvious why it’s there. Walk-in from Black Rhino parking is easy enough (as described in the Black Rhino section of NWB Mountain Crags volume). Unfortunately, it rained more last night than I’d realised and the top was soaked - didn’t fancy grovelling over with one pad and no spotter.