We have two products that ship with UK approved international power supplies and adapters, both are available from Walthers.
5240042UK powercab uk 2 amp system
5240046UK dcc twin uk 3 amp system
5240046AU dcc twin AU 3 amp system
For 5amp systems you would use the P514 5240238 but it does not ship with a plug adapter. The P514 ships with the PB5 5 amp booster as well
The P114, P314, and P514 are all international power supplies, ignore the listed rating on the P114, it is incorrect.
The P515 is the one you want to avoid. That is designed for US only 120VAC transformer.