The Office for Budget Responsibility last year projected a £15.2 billion hit to the public finances by 2020/21 as a result of Brexit. This would translate into a £2.4 billion reduction in annual NHS spending in England alone.
There has been a gradual reduction in performance on A&E waiting times for the last five years. Even Scotland, which has kept performance fairly steady, has never managed to meet the 95% target in winter.
Currently the ambulance service in England has three main response time targets based on the urgency of the calls received. Nationally across all these targets has deteriorated markedly over the last few years.