So Pat you are confirming that the UK still uses single phase 240, 50hz? Europe is using 240 double phase with both wires hot and no ground other that the safety third wire to ground. Always good to learn something new.
Close but not actually true....
The voltage throughout Europe has been standardised since 2003 and has tolerance values which allows some fluctuation.
The actual figure is
230v. -10% +6% which allows for the 240v that has traditionally been found in the U.K. and the 220v found in the EU although even that may not be absolutely accurate.
Some parts of the UK (Islands) have 250v which is still within the tolerance levels, just.
The majority of people in residential properties in the U.K. are on monophase supply. High demand users e.g. Factories, farms etc may be on triple phase which allows greater power consumption without thicker wires being needed. The wiring for triple phase is more complex and may involve different sockets if all three phases are to be used.
In Europe many of the rural properties were once farms using electricity to power heavy machinery e.g. Pumps, saws, mills etc. These properties MAY have triple phase (we do) or monophase.
So the picture becomes even more complex and using triple phase means that the load on each of the three phases should be balanced - we have one master RCD with three linked cutoffs, one for each phase so that if one fails, the others cut off too, there are then three rows of trips, one for each phase and the load on each has to be nearly the same if all switched on at same time.
I can happily supply links to verify this if you are really keen to fall asleep.