Speaker Sir Lindsay Hoyle criticised the leaks, branding it the “hokey-cokey Budget,” and reminded the government that policy should be announced first to the Commons.
James Murray, chief secretary to the Treasury, told the Commons: “The government puts the utmost weight on Budget security, including prevention of leaks of information.
“A leak inquiry is now under way with the full support of the chancellor and the whole Treasury team.”
Mr Bowler would investigate the “security processes to inform future fiscal events”, Mr Murray said.
The Chair of the Treasury Select Committee, Dame Meg Hillier MP, said: “Leak inquiries have a habit of not finding someone responsible. But if somebody is found responsible, will they follow the lead set by Richard Hughes [and resign]?”
Mr Murray responded saying he would “not speculate on the outcome of the leak inquiry”.
