Immediately leave the building and tell others to do likewise. Close the doors behind you.

Use the nearest and quickest safe route to outside, there are at least four; one by the MRI control room, one by the entrance to MEG, one at the end of the open plan area nearest the Biocentre reception, and one at the YNiC main reception.

When outside, got to the place of Assembly (in car park) and stay there until the Fire Service has completed an evacuation check of the building. Report to the fire marshall. If you know of anyone still to be inside, tell the fire marshall who will inform the Fire Service.