With a new year and a new, majority, Government came a new Defence White Paper, named after Minister of Defence Mason. A telling statement, buried deep in the White Paper’s many pages, showed how the Heath Government’s decision to build a pair of aircraft carriers was now driving Defence policy rather than policy driving acquisition. The White paper noted that while any NATO country can contribute an Armoured Brigade or a Fighter Wing only Britain in all of European NATO can contribute a Strike Carrier Battle Group. This was a subtle acknowledgement of an adoption of a Naval and Peripheral Strategy as Britain’s contribution to NATO, at the expense of RAFG and BAOR is necessary.(1) However if Britain was stuck with Strike Carrier she would make the most of them, so apart from some residual forces on Cyprus the British presence in the Mediterranean, a British lake for centuries, would be withdrawn and largely disbanded. Given the increased availability of Gas Turbine carriers it was announced that HMS Eagle would be retired as soon as the refit and building schedule of the new CVAs would allow it. Other major ships to go as a result of this review were the cruiser HMS Blake and Commando carrier HMS Bulwark, however HMS Ark Royal’s imminent retirement had long been planned.
The RAF also suffered cuts, with half of the 29 strong Belfast fleet being retired and the remainder amalgamated into a single, large squadron.(2) This was the tone of the review for the RAF, with units withdrawn from the Far and Near East, wings or squadrons disbanded while filling up RAFG and Strike Command Wings and Squadrons to get economise on Headquarters. The number of units in BAOR was also reduced, however this was presented as an increase in REFORGER strength. The overall trend could be called downsizing by modernisation, with old equipment being retired and units reduced faster than new equipment was acquired. There was considerable continuity as well as change, including the confirmation of a new class of large ASW frigates and more Type 42 destroyers as well as the ongoing acquisition of Jaguar fighters, while the commitment to the nuclear deterrent meant the continuation of the Chevaline projet.
The Mason review also formalised into policy the diplomatic and commercial reality that in these troubled times the Shah of Iran’s tank requirements were driving tank development in Britain. With the failure of the US-German MBT-70 project in 1970 and the US decision to go it alone in 1971 the Germans approached Britain as a prospective development partner for a next generation tank, utilising the development work already done with the MBT-70 project. Simultaneously the Iranians were working on the FV4030 series of AFVs, based on the Chieftain tank in three phases. Phase 1 was an improved Chieftain Mk5 with an 850hp engine,(3) fully automatic controller for the TN12 gearbox, a 50 imp gal fuel capacity increase, thickened underbelly mine armour and shock absorbers fitted to the front and rear suspension units. This vehicle offered the opportunity for a significant upgrade path for the existing British Chieftain fleet. Phase 2 incorporated the Chieftain hull front and turret casting. The rear of the hull was reconfigured to accept a new power pack comprising Rolls-Royce 30 litre CV12 1200 HP engine,(4) David Brown TN37 transmission improved Super Horstmann suspension, new final drives and tracks. Britain had no direct interest in this tank, however it would foster the development of the new engine of greatly increased power and development potential and it’c accompanying transmission. Phase 3 represented a completely new-MBT incorporating Burlington armour to the hull and turret, as tested on the FV4211 prototype from 1971. The rear of the hull similar in design to the Phase 2 but with hydrogas suspension, improved command & control and new commander's day/night sight. Weighing these two options carefully the Wilson government noted the drastic cost increase and diverging US and German requirements of the MBT-70 programme compared to the logical and beneficial development path of the FV4030 and decided to undertake the Future-MBT project with Iran using the FV4030 family of tanks, with Phase 3 F-MBT becoming known as MBT-80.(5)
- IOTL the naval contribution was ASW forces in the Eastern Atlantic
- IOTL the RAF disposed of all it’s 10 Belfasts in 1976 as a result of the Mason review.
- IOTL 4030 Phase 1 kept the L60 with 750hp
- IOTL the RR CV12 was 26 litres, a big jump from the L60s 19 litre capacity
- IOTL Britain signed on to the F-MBT project with Germany