The Diamond was a British single seat ultralight aircraft, developed by Arthur Luff in the 1980s.

Arthur Luff, a former Rolls Royce engineer and an RAF gliding instructor, designed a closed wing aircraft.

[1] Originally called the Snipe, it was later termed the Diamond, in acknowledgement of the wings' configuration.

The aircraft had a fully enclosed fuselage, and was equipped with a single engine, powering a tractor propeller, and had a tricycle undercarriage.

[2] According to Flightline, in its issue dated July–August 1985, an order for 15 aircraft had been received from the Middle East.