Official figures show the amount the British royal household is costing taxpayers there hasn't risen over the past year.

It stands at 35-point-7 million pounds, despite a rise in travel and building maintenance costs.

The so-called sovereign grant allows the royal family 15 percent of the income of all the property it owns in the Crown Estate.

But Andy Silvester from Britain's Taxpayers' Alliance says royal finances need to be more open.