This report describes fire tests carried out in two caravans, the purpose of which was to determine the time available for escape in the event of fire. This is of considerable importance because a sleeping risk is involved. Both caravans had identical linings and furniture. They had smoke and heat detectors fitted, and in addition one caravan had a simple sprinkler installed. The fire in both caravans developed quickly, and the results of the tests show that the time available for the occupants to make their escape is very limited.