And the ECML history is a good example why in my view the whole franchise model was flawed. Railway investment and operation is long term. Decent rolling stock may have a 40 year life with refurbishment. Infrastructure improvements are long term. Once short-termism (not sure if its a word!) took hold failure was guaranteed. For railways to be successful a long term view needs to be taken, and political micromanaging needs to end. Set service level requirements, agree subsidy if required, and then let the business get on with it, with some sort stick/carrot to encourage the best use of resources, infrastructure, rolling stock and staff.
Franchising ensured that all the routes got investment every 7-10 years (infrastructure, rolling stock, stations etc).
The BR model favoured intercity first and then NSE with investment, leaving "Regional Railways" out in the cold.
Northern/TfW/Scotrail would not have got new trains under that model, they would be operating cast-offs.
The DfT aim was to improve the finances of all the franchises, reducing the overall subsidy over time.
That sort-of worked until 2019, but is not viable now.
The Treasury (who else) vetoed long franchises which would have offered more risk/return for the owner, and more investment.
Only Chiltern got a long Mk2 franchise (now expired).
The policy when Covid struck was to have more smaller franchises to attract new bidders.
Nobody knows what will be proposed by the next government (of whichever hue).