Military aircrew from as far afield as Australia and the Czech Republic are in North Yorkshire as part of an exercise to prepare British crews for war.
Royal Air Force helicopters and fast jets are involved in the training at RAF Leeming, where pilots are gaining advanced skills in air warfare.
The base was chosen because it is close to the North Sea and training areas like Otterburn.
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Mild but rather cloudy, with a rain for a time to end the week. Friday should improve to brighter, cooler conditions. A windy weekend.