leading-edge interplane strut of the tailplane, but this was not made standard. Two modified Boxkites were produced for competition purposes. The first, No. 44, was a single-seater built to compete in the 1911 Circuit of Europe air race and had reduced wingspan and a nacelle for the pilot, similar to the Bristol Type T. The second, No.69, was a redesign by Gabriel Voisin, who was employed as a consultant by Bristol. This had no front elevator, monoplane tail with a single rudder, and a reduced gap between the wings. It was tested at Larkhill in February 1912, but was evidently unsuccessful since it was soon rebuilt as a standard Boxkite and was to crash in November 1912. Production continued until 1914 with a total of 78 being built, 60 of which were the extended Military Version, one racer (No. 44) and the voisin variant (No. 69); all but the last six aircraft were built at Filton. The remaining six were built at Brislington by Bristol Tramways. Operating history After the successful flight on Salisbury Plain No. 7 and a second aircraft, No. 8, were sent to Lanark to take part in the aviation meeting held there in August. These aircraft were then assigned to the Bristol flight schools, No. 7 at Brooklands and No. 8 at Larkhill. In September a third aircraft was completed and delivered to Larkhill, and both the Larkill machines participated in the Army manoeuvres held on Salisbury Plain that month. No. 8 was flown by Bertram Dickson, and was captured by Blue team cavalry when it landed in order to report by telephone, and No. 9 by Robert Loraine. This aircraft was equipped with a radio transmitter for trials and was the first aeroplane in the United Kingdom to send a message by radio. Between 11 and 16 November a series of demonstration flights were made in Bristol. Temporary hangars were built on Durdham Down and although flying was limited by the weather conditions a crowd of almost 10,000 saw Maurice Tetard make a fifteen-minute flight on the Saturday. The most spectacular flights were made the following Tuesday, when around ten flights were made between 7 and 9 o'clock, including a fifteen-minute flight by Tetard during which he flew over Clifton Suspension Bridge and made a circuit over the suburbs of Redland and Westbury. Weather conditions then deteriorated and only a single flight was made in