Whilst I'm on the computer -
Scats are not evidence that there are big cats living wild in the UK.
My Uncle is pretty high up in Dragonfly circles (he's an Emperor.... ok.... sorry
), seriously, he is well known in the Dragonfly "world", and he used to (still does for all I know) utilise Lion dung from wildlife parks and zoos around his Dragonfly reserves, to keep away the deer, so young saplings etc... would not be nibbled.
It works, and its a regular as clockwork event - picking up the lion poo, and depositing it in quite remote areas.
Likewise, if I was a big cat keeper in such a wildlife park or zoo, I'd possibly take great delight in smuggling out a lump of poo, and dropping it accidentally on exmoor for example. Well maybe I wouldn't, but I'm not denying that that sort of thing couldn't or wouldn't or DOESN'T go on with some people with what many would call a puerile sense of humour.
Scat or poo or strands of fur etc... is not evidence.
Evidence is real video / photography (at a recogniseable location for others to agree on afterwards) of the actual beast(s), alive (not dead).
TBR