Lingerie importing request - United Kingdom

I'd be interested to know if we can start with design you already have or start from a blank canvas. If from existing designs, could I have the flexibility to modify? In any case, will need all designs to be exclusive to my brand please.
This is a new and existing venture I wish to pursue and launch very quickly but due diligence is important so hoping you can help.

Could you please send me information on the following: