@kent_white answered the 'quite simple' question very well yesterday. Rising demand due to an aging population living longer with multiple comorbidities, rising expectations, impact on the service of drastic cuts to public health and social care (both of which come under local government) and the same energy & other non-pay inflation that's hitting every other area of the economy.
Trouble is he didn't give a pithy anecdote about 'managers', 'PFI', 'procurement' or 'demand from immigrants'; so you didn't bother paying attention to it.