She is hardly short of a few bob, but the Queen’s coffers are nevertheless being boosted by profits made by the Bluewater shopping centre, it has been revealed.

The income the monarch receives from The Crown Estate, which has a small stake in the Greenhithe shopping centre, is to be reviewed by the government after public funding surged to £40m.

The link with the giant retail hub emerged in national media coverage of the royal family’s finances.

The Treasury is expected to begin talks with Buckingham Palace shortly to discuss a new deal on how much money the Queen and Duke of Edinburgh receive from the Estate as well as other segments of the sovereign grant.

The Queen has a 1.2% share in Bluewater as part of the vast property portfolio of The Crown Estate, of which she receives the equivalent of 15% of the profits.

The sovereign grant has risen by almost a third since 2012 due to the commercial success of the estate.

In its first year the grant was £31m, rising to £36.1m in 2013-14 and to £40m in the current financial year.

The royal trustees – David Cameron, George Osborne and Sir Alan Reid, keeper of the privy purse – have powers to change the level of the grant.

About a third of the grant is used for maintaining the royal palaces, a cost that has been estimated at £50m.

The catalogue of land includes much of Romney Marsh, London’s Regent Street and Ascot racecourse.