Yes, it does. Britain displayed a curious sympathy towards Soviet Russia in the immediate post war years. Given that a few British double-agents were literally in bed with the U.S.S.R., it is not surprising that a great deal of what would otherwise be classified as national secrets were given away.
The man ultimately responsible for handing over jets to the USSR was Stafford Cripps, who had been ambassador to Moscow during to war. He had known Marxist sympathies even before this but I can't help wondering whether Stalin had gathered some blackmail material when Cripps was in Moscow.
How much of Britain's rather limited talent (small country, not the greatest technical education programme) was tied up in making a marvel of technology with no commercial future?
Not much, a lot of Britain's aviation talent went to the USA because there wasn't enough work in the UK. Which is why many 747 systems are remarkably similar to the VC10.