O2 scammers investigated by BBC

[Oxonian]

This article reveals details of a scam involving impersonators of O2 :-

'You've been rumbled. You've been caught': Moment BBC'S Scam Interceptors hack into system of phone ...

https://www.msn.com/en-gb/money/technology/you-ve-been-rumbled-you-ve-been-caught-moment-bbc-s-scam-...

It might go some way to explaining why O2's fraud investigators seem to be very cagey !