Short SB4 Sherpa Ulster Aviation Society Lisburn - YouTube
Short SB.4 Sherpa. It was designed to test aero-isoclinic wing, which was believed to possess advantageous qualilities for tailless aircraft. After it's flying career was completed, it was used in ground testing.
Short SB.1 - Wikipedia
Short SB4 Sherpa Cover
Aviation photographs of Short SB.4 Sherpa : ABPic
Short SB.4 Sherpa: Experimental British airplane that tested a new type of rotating wing-tip : r/WeirdWings