Well, when visiting Lincoln last week (Thursday) we spotted 4 Cougars in one afternoon:
1) Blurple, passing Mill Lodge heading out towards Branston (didn't get reg)
2) Green C2 Reg: X791 FDU - St Marks car park, Lincoln town Centre.
3) Ebony C1 Reg: K17 GLY with Union Jack covers on wing mirrors - Mill Lodge car park, Canwick Hill, Lincoln.
4) Blurple V Reg ending in DRT at South Park roundabout in Lincoln
I have never seen so many cougars in one afternoon in one place and none being part of the forum.