Single escape routes - permitted circumstances

Alternative escape routes should be provided from all parts of the building other than in the following circumstances where a single route is permitted – (a) areas from which a storey exit can be reached within the maximum travel distance in one direction only given in Table 2.3, provided that no room in this situation has an occupant capacity of more than 60 people, or 30 people if the building is an Institution [Purpose Group 2(a)]; and (b) a storey with an occupant capacity of no more than 60 people provided that a storey exit can be reached within the maximum travel distance in one direction only given in Table 2.3.