This looks like something the UK Gov could use for SELT exams, visa & immigration tests or other similar secure tests approved by the government. At the moment

This looks like something the UK Gov could use for SELT exams, visa & immigration tests or other similar secure tests approved by the government. At the moment these are taken in person in secure buildings where you are identified at the entrance, your belongings are stored in a locker, and the exam itself is taken in a secure room on computers with no/limited internet connection, etc. You are timed and monitored.