The funding for the British atomic programme was skimmed off the single service estimates in 1947, which were not funded through the Marshall Plan. Moreover the McMahon act meant that the US would have been watching how the money was spent because they would not support a British independent nuclear programme. The funding for the program wasn't discovered until Churchill returned to office in 1951 and found out how the money had been hidden -100 million pounds.We were bankrupt, Its a fact we borrowed enormous sums from America and others well over 57 Billion, much of it went into our military look at a spike chart at our military spending then, it wasn't the then british taxpayers money..our country has lived in this ridiculous bubble of "winning the war" and it was never challenged....hence people like you are so naive about it.
It wasn't until 1957 with the defence white paper that Britain seriously looked at restructuring its forces. This review showed that 7% of the adult male population was in uniform and there were 150000 servicemen outside of the UK and Europe. Duncan Sandys realised that this was having a huge economic impact on the United Kingdom, not only the cost of keeping these people in uniform but the loss of these people to industry.