on another point.. BS1363 are avoided in many situations where it would be difficult / dangerous to have to change the fuse.

Theatre lighting rigs (BS546 or Ceeform)

Built-in appliences are often connected to a fused switched spur located nearby either wired straight in or to a BS546 (15amp) socket behind the applience. (or simply have the plug located where it can be reached which is not always possible.) This means you never have to remove the entire applience if the plug fuse blows. It's quite possibile with an applience like a dishwasher or washing machine, particularly in Ireland on 220V where the max load (13amp) for the fuse can easily be reached during the heating cycle on a regular basis and the fuse lifespan may not be indefinate even without any over-current faults.