I was on Sunday night's LHR - GCI and passenger count was 33 (with three no shows from what I overheard the ground crew saying).
When I flew GCI -BHX on Friday evening I counted 56 getting off the LHR in Guernsey before the aircraft did our BHX run.
Sunday night's LHR - IOM flight was from the gate next to us and I counted about 12 people from where I was sat who got on the bus.