I've travelled twice this week (and before that not for over a month) and will travel again later today.
On Tuesday, Hatfield had loads of RPIs present - including my favourite RPI (who I didn't have time to chat to, as I didn't fancy being stuck with him for another four hours). I wasn't checked on the train going in, but was on the way back home.
Yesterday, I was checked by a single RPI into London and about 6 on the way home (a 4-car service) but as I walked through, it became apparent that they weren't having a lot of hits - not even in first class.
Perhaps their tactics are paying off, even with the gates being open at Finsbury Park.
Finally, if railway workers are frustrated that BTP never take their calls for help seriously - there were 5 of them patrolling Finsbury Park (3 on platform 3, 2 on platform 5/6) last night.