Not alot of airlines do head counts although i presume this will now be re-introduced.
I am sure JET2 do headcounts...I know EZY or FR did at Easter when I flew from Liverpool.
Yes..I am 99.99% that jet2 also do headcounts.
I am flying from MAN on Monday with LS, can't say this incident gives me confidence in either.In particular Jet2...Could have been anyone.