The Government can't specifically support OA - it's illegal for them to do so on both Competition and Procurement grounds. The fact that it directly contracts competing services is problematic for both them and the OA operators. if they weren't so involved, it would have been much easier for them to subsidise the operation in a pseudo EMA or a direct contract. it's been looked at in detail by both the DfT and the OA owning groups.
Hull Trains is not primarily abstractive, never has been and when GNER tried to claim it was in the High Court, they had to withdraw that charge on the first day of that infamous court case against the ORR, which they lost, badly.
People on this forum are fixated by ORCATS. Inter Available revenue is now such a small proportion of ECML (& WCML) flows so ORCATS raiding is very much a thing of the past - getting your key flow revenue up to 80% - 90% Dedicated is now the name of the game. If you are starting an OA operation now you have to compete on price and service offer otherwise you will go bust big time and quickly. Connecting flows tend to be IA but even with those there is an increasing tendency to do joint tickets to maximise Dedicated revenue and cut out the ORCATS leakage.
Both GC and HT have been pointed into the direction of extending their existing TAA's to cover their Covid related losses. GC have a one year extension application in with the ORR and HT have a three year extension application going through the system now. Both are expected to be granted.
During the great toilet roll shortage / supermarket ransacking of March 2020, the government did suspend the usual competition laws to permit supermarkets to coordinate supply chains, so there is precedent of sorts.
In the Open Access sense, could be argued as protecting competition in the long term.