I don't think you quite right about the 230V and the UK.
There is a good description of the history here:
But to summarise:
Pre-1995: 240 V +6 % / -6 %? (225.6 - 254.4 V)
From 1 January 1995: 230 V +10 % / -6 %? (216.2 - 253.0 V)
Only the spec changed in 1995, no hardware was altered.
MK
