I wasn't happy to disturb it and look at the belly, but I think the colouration of the back makes it likely this is a female.
No interactions present.
Nice photo. It's quite spotty and the head is relatively large so I would think it is most likely a male. Always difficult to know for certain though.
I posted this observation to highlight how I sex common lizards....
for the comments. Unfortunately, (s)he wasn't in the best position to see the "bulge". Of the three common reptiles, Common Lizards seem to have been the trickiest to get decent shots of over the years.
Masked Marvel is probably right about the gender - dorsal colouration is not a reliable guide, I suspect.
Lat/Lng: 52.4515, -0.1889
OS grid ref: TL231852