Determine routes of users of old Android versions
Isn't the Wi-Fi probe MAC address randomization introduced in iOS 8 supposed to defeat this kind of caper? (It got off to a shaky and ineffectual start, but reportedly was much improved in iOS 9.) Android got around to introducing the same feature earlier this year. So TfL is likely to be tracking only users of old Android versions. They'll just have to hope that these punters take the same routes as those with pricier phones, who are probably the people that interest advertisers most.