The East of England Ambulance Service, criticised over poor response times, is to take delivery of 120 new vehicles.
The first will go into service in Norfolk, where cover has been described as poor by health watchdogs.
The aim is to have no ambulances over five years old.
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Dozens of events have been held across the region to mark Armed Forces Day.
Morning's likely to see plenty of cloud bringing some mainly light and patchy rain.
Any showers should die away this evening with most places dry overnight.