The lads have been caught by the police during the dress rehearsal. Their names are being taken and the clock on the wall in the police station says 11.40 a.m. - it's in daylight. The security videos are brought in and the time on the one they watch is 12:27.
As the finale was filming, the actors performed the entire strip routine in front of the crowd - the only time that they went 'the full monty'. To counter understandable nerves, all the actors had enough to drink beforehand to make them at least slightly drunk. Some got a bit carried away and were very inebriated, for example, when Gaz kisses Nathe, it was not scripted (look at Nathe's face), but was carried out because Carlyle was drunk.