???
They make EU PSU's differently to UK ones? Do you mean simply you've got an EU>IEC rather than UK>IEC at which point just use your old one.
Be far easier to buy a cable than to return the psu and get another. I've always found psu's generally come with both types of cable though.
The PSU will work in EU, UK, US ...
They used to have a switch for 120/240, now it is automatic.
Use a different kettle lead.