With only four trains (in two pairs) that are close together that's a risky move unless you just get back on the same train.
There's a +6 between the 1138 from Morecambe and the 1144 to Carlisle, which is a little tight, but doable, but I had a couple of backup options, first off if the train had been a few minutes late leaving Lancaster, I'd have bailed at Carnforth and gone round the coast (I still have a few shacks I need around that way), if we'd been delayed between Carnforth and Long Preston, I'd have got on the first bus out, either to Skipton or to Settle (and got a healthy amount of Delay Repay out of the deal)