Let's clear a few things up;
1) The passenger terminal is never closed bar Christmas day itself - Flights regularly depart STN pre 6am and arrive upwards of 2am.
2) The reason the flight was not re-fuelled was because (see #3)
3) 30+ flights diverted to Stansted that night from LGW, LHR due to to those crazy winds we experienced. Swissport had nobody available and hence there apology to Ryanair
4) Unfortunately for the passengers had there flight been operated by Stansted crew they would have been offloaded by the crew themselves because they would have used there passes to gain access and supervise the passengers once inside.
5) Nobody from Swissport available to re-fuel or de-board and supervise the passengers or even to open re-open the gate plus the crew were Porto based and had no access even though they ended up overnighting along with the pax.