The CV-22B Ospreys were call signs Knife 71 and Knife 72. Based out of RAF Mildnehall, Suffolk.
https://www.mildenhall.af.mil/About-...erations-wing/
Serial 10-0052 (Knife 71) & 12-0065 (Knife 72)
https://www.airliners.net/photo/USA-...prey/2738894/L
https://www.jetphotos.com/photo/9358144