By Jack Mendel Labour leader Keir Starmer has committed to a massive increase indefence spending and said this morning that Britain’s nuclear deterrent is a “bedrock” of his policy. The prospective prime minister, who is miles ahead in the polls before a General Election, committed Labour to spend 2.5 per cent of UK GDP on defence. This comes after the UK, US and Australia were set to hold talks on new members joining the AUKUS defence and security pact, according to reports. This morning, he shored up his commitment to defence spending by saying Labour would continue to back the nuclear deter…