This is a separate insect from the typical 7-spot, and is very rare, and most often found near wood ant nests. It is slightly smaller, but more rounded than the 7-spot.
The best method of confirming the identification of the scarce 7-spot, is that it has a white patch under all 4 rear legs (just visible in this photo). The typical 7-spot only has white patches under the front two legs.
All pictures
© Peter Burford
All pictures
© Peter Burford