Rail Delivery Group (RDG) issued a staff brief regarding "split ticketing" on 10th January; included in this brief was the following clarification: Some train companies (e.g. GWR, SWR) make this explicitly clear in their Passenger Charters. If you are incorrectly denied a legitimate Delay Repay claim, I would quote this to the relevant company. If they continue to refuse, you can refer them to the Rail Ombudsman. Delay Repay claims go to the company who caused the delay; if you are further delayed later in the journey, this does not transfer the Delay Repay liability to a different company.