I've put in a number of delay repay claims over the last couple years (this is what happens if you have to use Thameslink) and the amounts received for similar delays seems to vary. I would have assumed there is a formula for calculating what is due but this can't be so. For example a few weeks ago when the core was properly up the spout due to repeated signal problems at City Thameslink I have received two approved payments of 50p for delays of 15-29 minutes. Back in September a delay of the same proportion fetched a payment of £2. What's going on here?