That link of "eh hello"s is *well worth reading*, although would like to see an updated one since last firm data is 2002. It refers to some of the PSO expiring 1/2004 but I can't find a reference to them being renewed.
I have challenged a few posters on pprune on PSO issues (like Waterford and UK routes getting subsidy) but I learned a few new things myself reading it.
Also, RE have expanded services to include CFN to PIK, making it more viable to dedicate an aircraft to that route and LDY to UK ports so could be in a good position to challenge Loganair for the latter even if they lose out on one of the others.
It's interesting that DKM were flagging that the PSOs under strict interpretation of the regulations may not be legal since rail and bus provide capacity >250k/pa and were suggesting legal opinion be sought.