London firms sending staff home amid coronavirus fears
Image copyright PA Media Image caption Some people in London have taken to wearing face masks on the Tube
Three firms in London have now asked staff to work from home as a precaution against coronavirus.
Oil giant Chevron has asked 300 staff not to come into its office in Canary Wharf “for the time being”.
Crossrail, which shares the same building as Chevron, and media firm OMD, based in…