Speaking at an anti-Brexit protest in London, the former Labour spin doctor told scores of “Unite for Europe” demonstrators to obstruct the Prime Minister’s efforts to completely sever ties with Brussels.
Thousands of Remain voters flooded onto the streets of London on Saturday to protest against the triggering of Article 50 – allowing Mrs May to begin formal divorce negotiations – on March 29.
The march coincided with the EU’s anniversary celebrations in Rome, where leaders of the bloc’s other 27 member states gathered to discuss plans for the Union’s future without the UK.
During a shameless speech at the event, Mr Campbell said: “Theresa May said in her Brexit White Paper one of the things that gives her strength in her negotiations is the support of 65 million British people.
Alastair Campbell demanded Theresa May ditch her 'hard' Brexit plans
Prime Minister you do not have the support of 65 million for your ‘hard’ Brexit policy
“Prime Minister you do not have the support of 65 million for your ‘hard’ Brexit policy!”
The event attracted a host of Britain’s staunchest Remain-supporting figures, including Tim Farron, who also gave a speech, which was well received by the anti-Brexit minority at the march.
The Lib Dem leader walked on stage to whoops and cheers from the crowd, before paying tribute to the police and in particular PC Keith Palmer, who was stabbed to death during the London terror attack on Wednesday.
Mr Farron said: “We are defiant about two things.
“First of all, we are defiant against those who would seek us to be afraid after what happened last Wednesday.
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“Those people who hate us – they hate our democracy, our freedom, our way of life, our liberty, our love of country – they hate our peace.
“We need to make sure our response is not to have less of those things but to have more, so we stand in defence at that attack.”
He added: “But we also stand in defiance because we do not buy the argument that democracy ended on June 23 last year.
Remoaners Club: These people hate Brexit! Mon, January 16, 2017
Remainers are finding it hard to accept Brexit.
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“If you were the Prime Minister, and you’re respecting the result of the referendum that was very close to being a dead heat, then you would pursue a consensual Brexit.”
He joined Mr Campbell in calling for a ‘soft’ Brexit, insisting Mrs May’s decision to leave the EU and its single market made former Ukip leader Nigel Farage “look like a moderate”.
“Nigel Farage has spent the last 20 years going around Europe saying, ‘let’s be more like Norway and Switzerland’,” Mr Farron said.
“What are Norway and Switzerland? They are out of the EU, and in the single market.”