A statement from Bond Air Services said: "During normal operations yesterday, one of our EC135 fleet has experienced an indication defect that requires further technical investigation.
"Therefore as a precautionary measure we have temporarily suspended service operations whilst we undertake detailed diagnosis.
"We commenced investigations overnight, are continuing this morning and are in close liaison with Eurocopter regarding this investigation."
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Philippa has Monday's weather for the east
Philippa has Monday's weather for the west
The Bank Holiday Monday weather forecast for the western part of the Meridian region presented by Kate Haskell.