Kate Middleton's parents accused of cashing in

Kate Middleton's parents are facing accusations of cashing in on their daughter's wedding to Britain's Prince William.

A Best of British range has appeared on a website run by Carole and Michael Middleton, featuring street party paraphernalia and a Britannia Scratch Trivia card.

According to the website the cards allow people to impress visitors with their knowledge of Britain.

It reads: "Scratch away one crown to reveal the correct answer and impress your guests with your British knowledge."

The Daily Telegraph reports eyebrows may be "raised" at Buckingham Palace with the instructions on the back of the cards, which claims: "Got three answers correct? Queen of England. Got two answers correct? Close to the throne. Got one correct? The Queen's corgi. Got none correct? To the Tower. Off with your head."

Kate has previously worked for the family website as well as spending time as a junior accessories buyer for British high street brand Jigsaw.

Prince William and Kate are set to marry at London's Westminster Abbey on April 29, with the British public receiving a Bank Holiday in honour of the event.