I was in a car rental firm's mini-office at a UK airport, and there was a sign up saying you may be recorded. I got my digital voice recorder to start it off. The member of staff attending me might not have noticed, but I muttered "If you're recording me..." and tailed off with a smile as I held it before clicking the record button. The member of staff went to a forceful raised voice way of speaking immediately and told me it was illegal for me to record in their office. We went back and forth on the subject, me pointing out their sign, but he wouldn't progress with the car pickup until I showed him that the device was off.
What's the legal status of a person recording an interaction with a business, when the business has a blanket statements (sign in this case but it could easily be audio at the start of a telephone call too) about "you may be recorded"?
Surely if they broach the subject of recording to me, I can just start recording and use it with impunity. Specifically without notifying them, given that would seem equitable.
It seems to me that this is oddly ill-defined in UK law. There's a BBC article from 2006 on when it's legal to use a voice recording you may have surreptitiously made, but nothing appears simple here. We also have unending dash-cam and helmet-cam footage from the UK, including Jeremy Vine's interaction with that aggressive driver when on his bicycle, and yet nobody is ever getting cautioned or arrested for footage without consent, yet there's a suggestion in the BBC article that you could record something but not rely on it a court case without the implicit consent step.
The US has one-party and two-party laws that vary by state (dmlp.org details that), but the UK sits in some weird imbalanced place that seems inequitous (my spell checker is telling me that's not a word).
Does EU law have a bearing on UK law here? At least for the next 18 months?