The Hampshire and Isle of Wight Air Ambulance has been given the all clear to resume flying.
It and other services were grounded for safety checks in light of the crash in Glasgow.
The Dorset and Somerset Air Ambulance and the Thames Valley and Chiltern have yet to resume their services.
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Kate Haskell has the weather for the east of the region
Kate Haskell has the weather for the west of the region
Police said they are concerned for the welfare of 13-year-old Serena Alexander-Benson.