https://asn.flightsafety.org/wikibase/472629
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https://www.bbc.com/news/articles/ceq9g47xqx1o
Fighter jet canopy dumped in mid-air emergency
The air force confirmed the canopy of the Typhoon, from XI (F) Sqn at RAF Coningsby, was "jettisoned by the pilot" over the North Sea.
A spokesperson for the RAF had earlier said it was due to a suspected bird strike.