Houchen promised to keep the car-park funding for the life-cycle of his mayorship and then stopped it mid-term.
Councils have a huge problem with finding cash to fund mandatory services. They also have very few avenues available to generate extra funds.
Budgets get signed off based on forecasts, so Houchen is very much to blame for the shortfall in funding because he chose to not honour his previous commitment (which I assume was an electoral promise but would need to check).
Unless you can think of another way for RCBC to make up the shortfall?