I messed up my train journey today, as I missed the first train and the second one to Brighton was either running late or I misread the time when I checked this morning. Anyway, the later train got me there with two minutes to spare, luckily I only had to walk across the platform.
So I am on the train just pulling into Lewes when I noticed that it didn’t stop at Southease, a quick check on my phone confirmed that only alternate trains stop at Southease station. So I waited at Lewes for the next one as I didn’t want to walk in the other direction.