Both the Lincolnshire Echo and the BBC Look North had 7 individuals (including Sean Cunningham) entering the cockpit. The BBC also had the bit about 19 occasions.
Would everyone of those 7 have been expected to check the safety of the seat?
Yes it is the responsibility of
every person entering or working in the cockpit to ensure that the relevant safety devices are fitted,one needs a competency to do so - which is renewed every 6 months.