The city has such a bounty of world-renowned institutions that it can be hard to know which to visit first: from cutting-edge London exhibitions at the Tate Modern to Hope, the huge skeleton of a blue whale at the Natural History Museum.
"We had a backpack with snacks and we played around on our phones to kill time," Remmerie said. "The lights were on all the time and the sitting position was uncomfortable, so sleeping was almost impossible. That made it physically and mentally difficult."