Lunch at the Wellcome Trust's staff canteen. I asked if there were any 'hidden' places that were off limits to the public. Maybe a look-out over London or a lift to the secret 7½ floor with extremely low ceilings. Instead, we discovered some old mural on the way out of the main exit.
"Representing the only mural Picasso produced in England, the work was created in November 1950 while the artist visited the home of his friend, Prof John Desmond Bernal of Birkbeck College, one of the greatest British scientists of the last century".