No reason not to buy an import!
Renault dealers must treat imports the same as UK cars - some European legislation AFAIK (but dont take that as 100% - Ive never had to take me imported 172 to a dealer *touches wood*).
As said already, an import costs approx £300 to make it identical to UK spec:
- alarm £250ish
- locking wheel nuts £25-30
- window etching £25
And as long as its an import from an EU country, itll have the same length of warranty as UK cars, although sometimes youve got to apply for it.