Advance train reservations can sometimes work in your favour.
On the first night/day of LonJog last year, due to the ride running later than scheduled, I could tell we couldn't get to Bingham in time to then get the train to Nottingham, for our scheduled train back south. So I worked out a cunning plan. Rebecca & I bailed after the lunch stop, cycled to Melton Mowbray, got a train to Leicester, and after a 10 minute wait, then intercepted the scheduled train from Nottingham and hopped on. Being an East Midlands Voyager 222 type train with only 2 bike spaces, as someone already had their bike in there, the guard was originally not going to let us both on, until I proudly flashed our seat & more importantly 2 bike reservations for that actual train, and he shoved the other chap off.
I did feel a teeny bit guilty, although he didn't seem bothered.