By Amber Murray Polish firm Inpost launched in the UK in 2013 with 100 lockers. Earlier this year, it celebrated its 7,000th locker. Inpost works by operating a set of lockers across a country, which work with the country’s postal service to deliver parcels to and from the lockers. Customers can then pick up or drop off the goods in their own time. In the last year, revenue and parcel volumes have both risen by 25 per cent, to £515m and 264m parcels respectively. While business in Poland still provides by far the majority of revenue, the UK is Inpost’s fastest growing market out of the nine it…