Tshirts for a startup

Hi folks

My name's Ian. I work for a company called Scorebat and we want to make some swag for our employees and also to try to sell them.

Any advice about companies in London that provide this sort of service will be appreciated. We want to have tshirts, hoodies etc of good quality and design, something you wouldn't mind paying for.

Cheers
Ian Renton
Scorebat
ianrentsb@gmail.com