Overnight stone circle

On Sunday I blipped the stone circle in Bute park that actually only dated back to 1978. Today I waled the dogs up the forest and found this stone circle which dated to... today! They are filming up there today, there were catering vans, cameras on cranes, women on motorbikes. I didn't see any filming, but the sign said "WvA location" so I'm guessing it's the kids programme Wizards vs Aliens. Anyway, these weren't real stone plinths of course, just fake ones. Is it just me, or do they look a bit, well, phallic?