Re: 3 more days people
^ This.
I've mentioned before that in my new (mostly unused) Facebook account, there are things (apps) listed in my advertising prefs that they really shouldn't know about - sourced from my phone. I do not have the Facebook app, nor Whatsapp, or any other Facebook crud on it, so something *else* has got that info to them. If I do the 'download your data' thing, there is no mention of those apps (it doesn't include your account settings, so no advertising prefs are included) - so I'm hoping a Subject Access Request might yield the mystery source.
(I do have a suspicion as to that source - and if I'm right, the ultimate blame lies with WileyFox and an update).