Donnabryan, my husband did the Skills Test in the sim observed by the CAA thing to get his ATPL.
Expect a full "LST". Licence Skills Test. The usual "LPC" sort of stuff. Holding pattern, ILS, Non Precision approaches, single approach, go-rounds and the like.
When I did mine in the real a/c I had to do limited panel, timed turns, unusual attitudes and other such fun + the above. Not so much fun...