British Airways (BA) has spoken out against Heathrow over attempts to increase the costs of flights.

Willie Walsh, chief executive of International Airlines Group - BA's parent company - is against the airport's plans to increase charges by £600 million across the next five years. Heathrow's proposals have yet to be settled by the Civil Aviation Authority (CAA), which is due to reach a decision in October.

He said: "What we see is an airport that isn't being run efficiently, that has too many people, and those people are paid too much and are utilised in an inefficient manner."

Mr Walsh accused Heathrow's chief executive Colin Matthews for a lot of the blame, stating he was putting money into investors pockets and over-rewarding shareholders. Mr Matthews was said to have previously stated the airport will cut its spending by £10 billion if CAA's outcome is not in its favor.

A spokesperson for the airport said it has put plans forward to save more than £400 million in the upcoming five years. It also states the call from airlines for 40 per cent price cuts can not be realised without risking potential under-investment.