Alex,
Now I am going to chance my arm here as the memory some times plays tricks on me. However when I did my VC-10 training back in 1968 we were taken to the Vickers factory at Weybridge to observe the milling of the
wing panels, and it was impressive to see a huge slab of metal placed on the machine bed and then when the operation started huge amounts of swarf . In fact I believe 80% of the slab became swarf which was collected and returned to the foundry for inclusion in a new slab.
From this I always presumed the wings were built at Weybridge but could be wrong
