The history of royal wedding souvenirs

With all eyes turning to London for the royal wedding, the shops are full of William and Kate souvenirs.

In fact it is thought we will spend over £200m on mementos of their big day.

But buying royal wedding cups, tins and tea towels is not a new phenomenon.

Robert Opie is the director of the Museum of Brands in London - and as he explains, companies have been cashing in on royal weddings for decades.