This aircraft was the initial RAF Jaguar B (two-seat Trainer) and the final prototype (B08). First flown on August 30th 1970, this eighth prototype had 80% of the airframe to production standard. Used initially by BAC at Warton as a trials aircraft, it carried out low light TV (LLTV) work and some helmet-mounted display research. It spent some time at AAEE Boscombe Down in various trials, including rough-field take-off and landing, and was part of further LLTV trials undertaken with RAE Hunter T7 WV383 - also in this FAST collection. XW566 arrived at Farnborough on 3rd February 1982 with a LLTV pod mounted on the fuselage centre-pylon. After returning from Kemble, newly resplendent in it's 'raspberry ripple' paint scheme, it was used to trial and evaluate the Smiths enhanced diffractive optics Head-up Display (HUD), more LLTV research and vibration measurements for ISVR at Southampton University. After its last flight on 17 June 1985, it was used at Farnborough for Electromagnetic Compatibility (EMC) testing, including research into external radio-frequency field penetration and lightning strikes until 2004. It arrived at FAST on the 9th June 2004.