ATG Access’s President, Glenn Cooper was approached to be involved within a coalition of more than 100 of the country’s most senior business figures.
The coalition have advised that a Labour government would “threaten jobs and deter investment” in the UK.
In a letter to The Telegraph, senior executives from companies employing more than half-a-million people hail Conservative economic policies which they say show that “the UK is open for business”.
The letter, signed by 103 business leaders, praises David Cameron and George Osborne’s decision cut to Corporation Tax and warns that a “change in course” would “put the recovery at risk”.
Corporation tax will fall to 20 per cent. Mr Miliband and Mr Balls have said that Labour will reverse the cut if the party wins the May 7 general election. When the coalition took office it was 28 per cent.
The letter is the biggest ever endorsement by business leaders of a political party and will further undermine the economic credibility of Ed Miliband, the Labour leader, and Ed Balls, the shadow chancellor.
In a further blow to Mr Miliband, the letter has been signed by at least five business leaders who previously backed Labour, including Sir Charles Dunstone, the chairman of Dixons Carphone and Talk Talk plc, and Duncan Bannatyne, a former star of Dragons’ Den.
The list also includes Peter Grauer, the chairman of Bloomberg, the corporation where Mr Miliband chose to unveil his business manifesto on Monday.
The letter comes just a day after official figures showed that the UK economy is growing faster than expected and that household disposable income in back to pre-2010 levels.