The prize includes two tickets to the National Portrait Gallery’s Thomas Lawrence exhibition, plus a show catalogue and £80 to spend on lunch in the Portrait Restaurant.

At the exhibition, you’ll see more than 50 portraits by the great Regency painter Thomas Lawrence, whose subjects include royalty, international statesmen, society figures and military leaders.

And from the Portrait Restaurant you’ll enjoy amazing views over the London skyline, including Nelson’s Column, the Houses of Parliament, Big Ben and the London Eye.

Enter Day 20: National Portrait Gallery tickets, catalogue and lunch here