cupid_stunt
Chief seagull hater & farmerbarleymow's nemesis.
If the system actually manages to function then I believe some team would eventually get your info and contact you to talk about your contacts.
In the past a lot of this work, in terms of which of your contacts are then tracked down and told to self-isolate, has cut-off points based on arbitrary rules about what is deemed to be a 'close contact'. eg one aspect involved a 15-minute rule where the person didnt count as a close contact if the duration of contact was under 15 minutes, regardless of some of the other details of the contact incident. Since I am not privy to all of these details, on paper or in practice, I cannot therefore claim that the team dealing with you would decide to approach the pub and then follow up with everyone who was there. It would not shock me if, for example, they only intend to use the pub data if they get evidence of a cluster of cases linked to the pub rather than a single one. So it probably isnt just a question of you testing positive, but also other people who can be linked back to the same evening in the pub as you testing positive, and then someone getting the right data and joining those dots and then actually deciding to take action.
BIB - that's my understanding of how it would work, as carried out in other countries.