Why can't the UK & Ireland (and possibily malta and cyprus) change to Schuko?
I can't see why a special schuko outlet couldn't be produced for ring mains systems. All you'd have to do is to include 13 amp fusing on the sockets. BSI could insist that those were the only type of sockets usable in retrofits in the uk and thus preserve the ring circuit.
All appliences sold in the UK have harmonised european cabling on them for a LONG time and are quite safe to use on standard 16 amp schuko plug/socket systems.
A sollution like that would mean that fused plugs would be eliminated completely and the systems would be just as safe as they always have been.
I can't see a fusing problem as the fuse would be fixed in the socket on the live/hot side so if it overloads the live cuts out, just as it does in a 13 amp plug, regardless of which way the schuko plug is inserted.
Fusing schuko plugs would be pretty tricky as you'd have a 50:50 chance of the fuse being on the neutral and it would be impossible to prevent non-fused european schuko/europlug appliences from getting in to the UK/Ireland.
British wall plates are big enough to encorporate switches and lights along side the sockets so i don't see why a fuse, just like in a fused spur plate, couldn't be included on a new BS schuko outlet.
They could also insist on shuttering being used in the British / Irish outlets.
As it is at the moment most appliences arn't properly fused anyway. I can't see the point of the 5amp/3amp fuses as usually when one blows people replace them with 13amp as they're much easier to find. Europlugs are regularlly jammed into UK sockets and are sitting on 32/35amp rings with no fuse protection at all. I wonder what fire risk they pose?
BS 1362 fuses could continue to be used in these sockets too so you'd have lots of spares available from day one.
Companies like MK etc would still have the same share of the market too as the UK/Ireland socket outlets would still have to be manufactured with fuses and to fit UK wall plate standards. They would no doubt continue to make money from rewirable plugs too as their distribution channels are so well established. I'm sure that market is deminishing anyway since all appliences now ship with moulded-on plugs.
As for looks, if you look at MKs website they already make a schuko recessed fitting in various colours (including brass etc) designed to fit a normal double UK style wall plate and they look quite good from an asthetic point of view.
As for adaptors, you simply ship the appliences with european plugs and use those "fixed on" adaptors, which seems to be the case with an increasing number of appliences anyway.
Europlug:
Schuko: Grounded
Schuko: Non Grounded
After XX years the BS1363 would go the same way that the older systems went, it would actually be a much smoother change-over thanks to those adaptors.