Prince William presented a handwritten Christmas wish list to Santa Claus at a festive market in Helsinki (Details, pics)

Prince George had better have been on his best behaviour this year as he has his heart set on a visit from Father Christmas.

During a visit to a festive market in Helsinki, Prince William presented his son's handwritten Christmas wish list to Santa Claus.

In the letter the Duke of Cambridge's eldest child has listed that he would like to receive just one thing in his stocking this year.

Despite there being space for the royal to list five gifts George reveals that all he would like for Christmas is a police car before signing his name at the bottom. And the young prince clearly thinks that he is deserving of the present as at the top of the paper where it asks whether he has been 'naughty or nice' the four-year-old has circled 'nice'.

The letter was delivered by Prince William who paid a visit to Esplanade Park's Christmas market in Helsinki, on the second day of his tour of Finland. Earlier today the Duke of Cambridge, 36, was seen admiring a pair of hobby horses - an ideal gift for either Charlotte or George - during a visit to a tech festival in Helsinki on Thursday.

William was seen playing with the toy horses at the Slush festival held in the Finnish capital on the second day of his tour.

The royal appeared to be in good spirits as he wandered the stalls of the student-driven event, testing out the latest tech on display.

The father-of-two was in his element as he tested out a virtual reality head set during his tour of the event.

Earlier the prince met with former US vice president Al Gore when the campaigner opened the festival.