McCallum had a huge task on his hands after joining the Met as CIO two years ago: taking charge of digital transformation for a force that is notoriously slow to adopt changes.
Recently McCallum has led the rollout of cloud collaboration service Box, which is expected to save many man hours for officers on the street.
UK invests in blackhole-hunting LIGO facilities in Louisiana and Washington to get an upgrade to 'see' further
Scientists will be able to detect three blackhole collision events in a single day after upgrading work is completed by the mid-2020s
Windows 10 build for the first half of 2020 will require more intensive testing than usual
And they continue tracking users even when asked to stop
Companies like Huawei and Xiaomi look to Europe in the fall-out from the US government's action against Huawei