The B.R.M. team has co-opted Elford into their ranks to drive the late and much lamented Rodriguez’ car, with Siffert leading the team and Ganley being the third member, while McLaren are reduced to the two entries of Hulme and Gethin due to a shortage of engines caused by the Cosworth factory being on holiday, so it is Oliver who is dropped. The STP-March team has Peterson, Galli and de Adamich in their cars. The situation is rapidly developing where one Tyrrell car is bad enough for the opposition but two cars are twice as bad, and if Tyrrell ever enters three cars there will be a lot of people who will feel like giving up. His two entries are, as usual, Stewart and Cevert, while Lotus has their usual mixed-double of Fittipaldi and Wisell, and Surtees and Stommelen are in the Edenbridge factory cars, while Hill and Schenken are in Tauranac’s Brabham cars. The major changes to the machinery being used are confined to March and Lotus, for the STP-sponsored team has rebuilt 711/4, that Galli had driven at Silverstone with a Cosworth V8, and converted the back-end to take an Alfa Romeo V8 engine, while the Gold Leaf-sponsored team has built a new Type 72 to the latest D-specification, for Wisell to drive, this being R6, while his old car R3 has been refurbished and Charlton has taken it back to South Africa in place of Rob Walker’s R4, which has been the original choice. The minor changes involve the re-making (I cannot say re-designing) of bits that brake at the British Grand Prix, such as the coil mountings on the P160 B.R.M.s, and the addition of proven parts such as a full-width nosepiece on the spare Tyrrell car, while new minor details include a full-width nosepiece on Schenken’s Brabham BT33/3, German Bilstein shock-absorbers on Peterson’s works March as well as a cold-air box on its Cosworth engine, some experimental drilled brake discs on Hulme’s McLaren, revised air-collector boxes for the Surtees cars, and a solitary CSI/GPDA regulation rear light on Bonnier’s old McLaren, which is almost a new McLaren as it has been rebuilt with the monocoque being re-skinned.