Mr Robertson, the SNP spokesman in the House of Commons, shook his head and groaned as the Ukip leader set out how his party would spend more on public services including the NHS.
Responding to an audience question on spending more on public services in the BBC debate, Mr Nuttall said: “Firstly, we’d scrap HS2, which is only there for the benefit of one place and one place alone and that is London.
“We’d also look at the Barnett formula, which gives the Scots £1,700 per head more than us, the English. It needs to be scrapped.
“We’d also get an EU dividend and finally we would slash a foreign aid budget which is costing the British people £30 million every single day and we would transfer that money to the National Health Service.”
Angus Robertson responded after being told by Paul Nuttall that Ukip would cut Scottish funding
But Mr Robertson was having none of it as he groaned and mocked Mr Nuttall throughout.
Reacting to the Ukip leader’s pledge to use money saved from leaving the EU on the NHS, he said: “Oh the £350 million? The famous £350 million a week?”
And responding to the Ukip leader’s foreign aid promise, he added in jest: “Blame the foreigners.”
Earlier on, Jeremy Corbyn was blasted during the live BBC TV debate for promising to spend too much in Labour’s manifesto.
Home Secretary Amber Rudd fumed at Jeremy Corbyn after he criticised the Conservatives for not raising living standards during their time in power.
Ms Rudd snapped back at the Labour leader insisting that Mr Corbyn would not be able to provide his manifesto promises.
The Home Secretary said: “We are a party who will always support those in most need and the welfare bill for helping people with disabilities has gone up £7billion in the past seven years and is now at £50billion.
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“We will always provide that safety net when it is needed.”
Meanwhile, the Conservatives will lose their outright majority clinched by David Cameron in 2015 in the upcoming June 8 election, a YouGov projection has claimed.
The TV election debate – in pictures Wed, May 31, 2017
The televised debate saw Jeremy Corbyn, Amber Rudd, Paul Nuttall, Caroline Lucas, Angus Robertson, Tim Farron and Leanne Wood go toe-to-toe
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The politicians taking part in the debate
The calamitous news for the prime minister comes from the first seat by seat projection for the campaign, which suggests the Conservatives will fall 16 seats short of an overall majority. The polling method has taken into account an unusual technique using a complex computer model.
The YouGov prediction would leave Mrs May with 310 MPs – 20 fewer than at the time of dissolution of the last Parliament – while Labour are set to surge from 229 to 257 MPs on June 8 election, a gain of 28 seats in the Commons.
The scenario could leave Mrs May’s hand weakened ahead of Brexit negotiations – or see her ousted by an opposing coalition government.
Amber Rudd stepped in instead of the Prime Minister in tonight's debate, as she said she was focusing on Brexit.