London makes a net contribution to the UK's economy of up to £17.45 billion according a new report published by the Corporation of London.

This outward investment in the rest of the country's well-being, whilst recognised as a function of a healthy capital city, comes at a time when investment in London's own transport, housing and education systems is sorely needed, says the study.

Forum Response: Corporation of London

Michael Snyder, chairman of the Policy and Resources Committee at the Corporation of London, told ePolitix.com: "London is a leading world city. It needs a first class infrastructure - with positive investment in schools, transport and housing - to maintain its position, and to grow and prosper.

"If London does not grow and prosper, how can it be expected to continue to make the tremendous contribution it does to the whole of the United Kingdom."

Forum Response: Institute of Directors

A spokesman for the IoD told ePolitix.com: "London is undoubtedly the economic engine of the UK and its contribution to the country immense.

"The infrastructure of the capital needs radical and major modernisation if it is to remain one of the world's top trading cities.

"However, that should not mean other parts of the UK - former industrial and manufacturing centres for example - are deprived of investment in favour of London."