The committee advises Sage. Academics at Oxford used 'cell phone mobility data for 10 per cent of the British population' to track what a number of jabbed people were doing. The group were tracked by their location every day as scientists monitored what they were up to and where they were going. And they discovered vaccinated people were likely to move around more afterwards - although only by 218 metres. Campaigners battling state surveillance say Brits will be “disturbed to discover they were unwittingly tracked and subjected to behavioural analysis via their phones”. Silkie Carlo, a spokesman for Big Brother Watch, told the publication: "No one expects that by going to get a vaccine they will be tracked and monitored by their own Government.