25. Banner Group

Revenue: £154.1m (-5%)

Staff: 531

The tech store of this "expert in workplace supplies" is currently pushing HP, Samsung, Epson and Brother printers, Microsoft Surface devices, iPads and Jabra headsets. Customer office closures had a "material impact" on the Wakefield-based outfit's calendar 2021 performance, with revenues falling five per cent (despite its integration of the customer trading of Staples into the company in April of that year). Able to trace its roots back to 1786, EVO-owned Banner claims to make 18,000 deliveries a day.