Well, I have been delayed again between Bolton and Urmston by just over 30 min's and claiming "Free Tickets" as I usually do. Filled the webform in and I've had a reply from Northern.
It says I am not included within the rules of the Delay Repay scheme as I was using a "Multi Modal" ticket and they have refused my claim.
The ticket I used was my Greater Manchester Concessionary Pass. This makes me wonder what else I'm missing out on when travelling as a second class citizen.
Email the complaints department, claiming you wish to claim under The Consumer Rights Act. If the delay was within their control, thenyou will receive your free tickets. It's a lengthy process, but when it does (eventually) pull through, it's definitely a relief.