Policemen and women are trained to a level of fitness during their initial training, and it should be their responsibility to maintain that level, as a job requirement.
No-one would accept a soldier being unable to march in full pack - they maintain fitness as a requirement of the job they do.
Police forces should instigate regular fitness training for their officers, as well as providing them with access to a proper diet during working hours. the rest of the responsibility lies with the officer concerned.
The notion that a criminal can excape simply by being physically fitter than the police officer chasing him or her is simply not acceptable. Good diet is a personal responsibilty, there is no excuse for eating junk food.
Hopefully this edict will come into force, and policve officers, like other uniformed employees, will be required to maintain a level of fitness to enable them to perform their duties effectively.