Brighton has tradionally been the hardest Thameslink depot to get into
Indeed downsizing was talked about in 2016 but despite losing 20 odd to Three Bridges a similar number of mostly new drivers went to Brighton along with ex Southern
Brighton has some good work to Cambridge and Littlehampton but the latter is link 1 only. There was some awful all night work to Bedford including random staff stops and stopping at city TL / Farringdon whilst remembering not to open the doors ! (AC /DC changeover whilst stations are closed)
Night work includes stopping all stations Pancras to St Albans and Single Line working is common
Brighton unlike Three Bridges does nor have an all night service but there are still very early trains towards Brighton from Bedford
These jobs may go internally as many depot drivers at Three Bridges wish to go mainline. Part of the reason for this is their jobs are changing with pay being reduced.
A few live Barnham /Seaford area so may find Brighton easier to get to.