Animals of all ages and sizes were measured. Priscilla is London Zoo's 30-year-old giant Galapagos tortoise. They are the largest living species of tortoise in the world, and can weigh more than 400kg and survive without food or water for over a year!

Filming of the new TV adaptation of Harry Potter has been spotted in London. Footage captured by guests staying at a hostel opposite the film set shows the bustling activity on Borough High Street in Southwark.