Tim Montgomerie was put on the spot by Fiona Bruce.A leading Reform UK campaigner has admitted that the party’s spending plans do not add up.Tim Montgomerie, who left the Tories last December in a high-profile defection to Nigel Farage’s party, made the comment on BBC Question Time on Thursday night.He was put on the spot by presenter Fiona Bruce amid a row over the party leader’s plans to reinstate winter fuel payments, lift the two-child benefit cap and cut taxes.Keir Starmer accused Farage of planning a “mad experiment” with the UK economy and compared his plans to Liz Truss’s disastrous mini-Budget.Bruce told Montgomerie: “I know what your opinion is because you spoke about it this week and you said as far as you’re concerned, the numbers do