Luton - only 15, managed to get let out in time for Barlows leaving (after my mum was rung and told )
Colchester - kept in until 10pm, had to stay in a travellodge and get train home next day.
Gillingham - kept in until 9pm, by the time I got to Euston the furthest north any train was going was Wolverhampton. Had to get picked up from there, didn't get home till 5am.
I reckon Colchester and Gillingham cost me £800 between them.