So I went into Tesco yesterday having driven three hours in horrible traffic to get there (at seaside). Starving and had only got some plantain chips I'd brought with me in the car, so I ate those as I walked in.
Went to the fish counter and asked for some fish kebabs, while still eating these banana chips, finished them, did some shopping bought wine etc., paid, whole trip took about 20 minutes or so.
When I was walking out the exit and the security guard said 'Can I have a word', I said 'Yes what is it', and stopped with my trolley, he said 'Let's walk and do this?', but I stopped there.
He said 'I heard from one of the members of staff you were eating and I don't know if you brought it with you or it was from here.'
I said 'I brought it with me I walked right past you eating it when I came in'
He said 'In future could you please let me know when you come in that you are eating.'
I said 'I'm sorry but I'm not going to notify you, if you see me eating and you want to ask me that's fine, but there's no point asking me now is there, and I'm certainly not going to ask your permission to walk in eating something I bought elsewhere.'