Twiss landing the first production Gannet AS.1, WN339, at Northolt on June 9, 1953, after its initial flight.

The Fairey F.D.1 delta research aircraft was powered by a Rolls-Royce Derwent. Built at Fairey's Heaton Chapel works the sole example, VX350, was first flown on March 12, 1951, from Boscombe Down.

The prototype Fairey Delta Two, WG774, photographed at the time of the 1957 Farnborough airshow. Both F.D.2s were displayed at that event, one by Peter Twiss, the other by Fairey's chief test pilot Gordon Slade.

Peter Twiss and Gp Capt Slade indulging in horseplay with Harry Shaw of Rolls-Royce.

В конце 1947 года английское Министерство снабжения, наконец, признало, что Великобритания утеряла лидерство в разработке сверхзвуковых самолетов, и составило экспериментальную "спецификацию W3" на новый опытный самолет. Компания "Fairey" ответила созданием усовершенствованного Delta Two или F. D.2.
Climbing at an angle of 45 degrees, the first prototype Fairey Delta 2 (WG774) is flown by Lt.-Commander Peter Twiss, D.S.C., prior to the successful attempt on the world 's speed record on 10th March, when Twiss established the F.A.1. record of 1,132 m.p.h. (1,822 Ikm./hr.) over a nine-mile course between Chichester and Ford, Sussex. Two runs were made, the first (east to west) was covered at 1.117 m.p.h. (1,798 km./hr.) and the second (west to east) at 1,147 m.p.h. (1.846 km./hr.), thus exceeding by 37 per cent the existing record of 824 m.p.h. set up by Col. Horace A. Hanes in an F-100A Super Sabre on 20th August 1955. The Delta 2, powered by a 10,000-lb.s.t. Rolls-Royce (re-heat) Avon, undertook the record runs at an altitude of 7 1/4 miles (38,000 ft.) after taking off from A. & A.E .E., Boscombe Down, Hampshire. The span of the FD-2 is 26 ft. and the length 52 ft. 3 in. First flight was on 6th October 1954.
This aircraft was later fitted with a sharp-edged ogival wing and flown as the BAC 221 on research into Concorde-type delta wing flight characteristics.

The Fairey F.D.2 in which Twiss broke the world air speed record on March 10, 1956.

G-ALBL - первый Primer. Отдельный фонарь обеспечивал хороший обзор из задней кабины вбок и вниз, что особенно важно при посадке.
The Fairey Primer G-ALBL, first of two production aircraft built, flying over the Solent in September 1948. The aircraft was dismantled the following year.

Twiss airborne in the Tipsy Junior OO-TIT, fixing from White Waltham on August 26, 1948.