It is well known more SELF connect happens generally than is officially recognised & recorded.
In business, unless you can attach a number to it, it doesn't count I'm afraid. It might be "well known" but anecdotal evidence isn't reliable. Am not trying to take STN-BFS away from anyone, just reminding you Ryanair flew the route STN-BHD before, and indeed this is the third go on STN-Glasgow as PIK was axed then GLA was launched then dropped (!) Very good to see them back again.
But genuinely, can I self connect without having to go through security again if I land on a domestic easyJet flight?