64 Celerity

Key points

Revenue: £63.2m (+136%)

Net profit margin: 0.3% Staff: 43

This IBM and Lenovo Platinum partner more than doubled revenue in its year to 31 December 2018 thanks to an "exceptional" datacentre project at one of its major clients that it admitted is "not seen as repeatable in future years". The Preston-based outfit, whose strategy revolves around supporting the move to hybrid cloud, offers three primary services lines under the Custodian, Intuition and Citadel monikers, the latter being a managed security service it launched in 2018.