SB48 & Chev.
Heritage Locations - Heathrow Maintenance Base You are, sort of both right. BOAC American Aircraft Engineering Centre was extradited in 1949, to save $, from Montreal to Filton, alongside Line 3 HQ. In 1954 they moved in to (to be) Technical Block D, which had been specified in 1949 "to take the largest envisaged aircraft". That was indeed T.167...but BOAC succeeded precisely then in escaping any commitment to it, and it was reduced to "Research", gently anaethesised in 1952. Additional "Interim" proper aircraft would be bought for
Bring
Over
American
Currency, self-$-financed, while waiting for the
Medium Range Empire, ordered by Govt. for them 29/7/49, into Service 1/2/57 as Britannia 102. The doors were modified to let their tails breathe freely. Meantime
TBD served Strats and Connies.