Could not make any progress with ID of this one.
No interactions present.
Seemed a bit smaller than the other one I identified as Satin Beauty. Bit bigger than the July Highfliers that were also numerous (and poorly marked).
having had an expert look at it now it is indeed Satin Beauty as you suggested.
Lat/Lng: 51.254588, -0.315486
OS grid ref: TQ176519