The local voluntary lifeguard group out for an evening practice. The DLAG organisation is the largest in the world. Amazing that in 2020 some many people still drown and it's not getting any better thanks to all the austerity measures shutting down public swimming pools & cutbacks on children's swimming lessons.
Doubt they can be made out but there are two divers underwater - you can perhaps see the lines to them. On the Geotag it looks like they are training on dry land. Google Maps hasn't updated for some time!