Whistl, formerly TNT Post UK, is a postal delivery company operating in the United Kingdom. As a logistics specialist, they provide efficient, high-quality, competitively priced services across Business Mail and Parcel delivery management, full-service Fulfilment, Doordrop Media and Contact Centre services both in the UK and internationally.Their parcel carrier management services provide customers with one point for a range of carrier services. From tracked 24 hours to international service, they support the growth in parcel delivery and e-Commerce markets, with over 900,000 square feet of fulfilment space across the UK. Their tailored Contact Centre services can manage customer calls, emails, social media and other contact routes. They are market leaders in Downstream Access Mail (DSA) services handling over 50% of bulk business mail in the UK. Their range of mail services includes advertising mail services and our unique Doordrop Media portfolio across targeting, distribution and sampling services.