It wasn't a privately owned block though - it was council housing.
TBH even if there are fire alarms and sprinkler systems etc in large blocks of flats that isn't enough, last year we lived in a brand new build block of flats, mentioned to the site office that the fire alarms in the communal stairwell were bleeping due to low backup batteries, they stopped, we assumed batteries had been changed, but when we went in to read the electricity meter were shocked to find they'd simply been switched off at the mains fuse especially awful since there had been an electrical fire in the building in one of the other flats (before we moved in) - we moved out before our tenancy even ended.
Basic housing should have basic fire escape provisions, especially if they are too high up to climb out of windows.