UPDATE:
There has been a gas leak reported on Gower Place and on the advice of the gas provider, UCL have closed and evacuated a number of buildings as a safety precaution including: the Kathleen Lonsdale Building, the Physics Building, the Slade, 25 Gordon Street, the Lewis Building, 3 Gower Place and the Pearson Building.
Buildings will be open again as usual on Monday 27 January.