What is the appropriate evacuation strategy to use in a care home, now used for extra care? Applying specialised housing potentially implies that 30 mins FR is ok as building is low level but having a stay put in a care home designed building doesn't sit comfortably with me. Advice and reference to guides welcome

Lot's of factors to consider - staffing, size, person centred FRA & PEEP results, numbers of residents, etc. Extra care is still largely indepwndant living with more help available if needed and bridges the gap between sheltered housing and residential care. Therefore, subject to the build & other factors, stay put as oppose to progressive horizontal evacuation is indeed an option - but not the default without assessment and should be case by case.

You really only have the NFCC guide as before this there was nothing for non general needs housing except for sheltered and care homes for which the approach hasn't changed for quite some time.