A semi-hypothetical situation here (based on a past experience). Imagine you have an advance ticket which involves a connection, but the first train is delayed meaning you would miss your connection. Sitting in the platform in front of you is an on-time train going to the station you should be changing at, but your ticket isn't for that one but the next one that is delayed. Your second train is one that runs hourlyish, which means that you would be delayed over an hour and therefore entitled to delay repay (or whatever scheme is run by that TOC) (as I understand it, it is the TOC responsible for the delay who have to cough this up). Could you catch the earlier train instead, preventing you from being delayed, and the TOC from having to pay any compensation for said delay?