One bookmaker has really bought into the policies outlined in today's manifesto and obviously believe it can attract voters back to the Labour Party as they've cut Jeremy Corbyn's odds of being Prime Minister following the election to just 5/1.
The manifesto included a tax increase from 40% to 45% for salaries of between £80,000 (94,000 euros, $103,000) and £123,0000 a year, above which there will be a new 50% top rate of income tax.
His comments were dismissed by Labour's elections co-ordinator Andrew Gwynne, who said: "This is absolute rubbish from the Tories and yet another wholly cynical ploy to try and avoid scrutiny of their own spending plans".
There was no cost provided for the party's renationalisation plans for water, mail and rail services and its measure to take some of the energy sector back into public hands.
"A blueprint of what Britain could be and a pledge of the difference a Labour government can and will make", he told supporters at a university in northern England.
Corbyn said a Labour government would pay for increased spending by "asking the better-off and the big corporations to pay a little bit more". "While his figures are a fantasy, it is ordinary working families who will pay".
Opinion polls consistently give the Conservatives a big lead over Labor.
"The choice is now a Labour Brexit that puts jobs first, or a Tory Brexit that will be geared to the interests of the City, and will risk making Britain a low-wage tax haven".
Many in the Labour Party will also view Mr MCluskey's gloomy forecast as a lowering of expectations so the Labour leader can cling to power after 8 June until a younger left-wing successor can be found.
For early years, Labour leader Jeremy Corbyn promises 30 hours of free childcare during term-time for all two-year-olds - now 15 hours is available to the poorest 40%.
Mr Corbyn defended his tax plans, which include a guarantee of no hikes in VAT, personal national insurance contributions or income tax for 95% of workers, and insisted it was "reasonable" to look to raise money from the highest earners.
"You can only fund our National Health Service, you can only have the funding that we have made available in relation to the nation's child care if you have got that strong economy".
However, Mr Lewis indicated however that Mr Corbyn should ultimately pass on the leadership, saying he should hand down the party "in good order".
"It's clear that proposal after proposal in this manifesto will mean more borrowing and debt: from promises on benefits, to promises on prison guards, to promises on nationalising the water network", chief secretary to the finance ministry, David Gauke, said in a statement.