Are you thinking of creative watches in Birmingham? They’ve been recommended on here before. Not sure I’d touch creation watches – I doubt you’ll get a proper uk model watch and probably slapped for import charges too. Not all watch brands give a worldwide warranty. What are you after?
Edit: first Tissot on the list is a Le Locle auto at £391, rrp listed as £829. The actual uk price is £585. Add the vat and import duty to the creation price and your talking a 10% discount which you would get pretty easily for a uk retailed watch. Quick look at the other brands and a similar story. Can’t see anything where the saving would make the risk worthwhile IMO.