An our poster would have to clear the border then get around to the check in desks (which close 40 mins before departure) and then clear security and get to the gate before Easyjet closes it which I think is usually 30 minutes before departure.

I checked on google flights and are are 45 minutes between scheduled arrival and departure. No way they would get from the plane, clear immigration then get to the desks in less than 5 minutes.

This plan is not going to work and you need to make alternative arrangements to get to SOF.