Leaving a venue with un-opened drinks

[Guest2]

In UK, are you legally allowed to leave a venue with un-opened drinks?

My partner just left a venue (First Direct arena in Leeds) from an event with an un-opened bottle of wine which was paid for. On the way out, she had it taken off her my security. Isnt that theft?

 

[Guest2]

I wouldn't let them take it though. Open it, tip it down the sink.

Yeh, I said that too her. Should have tipped it out or at least opened it and stuck her tongue in it! Pretty sure they will re-sell it and now discard.

 

[Guest2]

What about restaurants? A few times we've taken unfinished bottles of wine out with us, to finish at home.

I thought about this too. I've been allowed to leave multiple restaturants in the past with un-opened or even half opened bottles of wine without any issue at all.

Its not a big issue at all, at the end of the day (like someone stated) its a bottle of wine thats probably £7 or £8 in supermarkets and was about £20 in the venue. But its the principle of buying anything and it being taken off you on the way out.
I wonder what would have happened if she said "no you arent taking it, I paid for it" "either refund me or arrest me" Pretty sure they dont have any powers to arrest so would need to call the police... but then on what grounds? Breaking venue rules of 'Only food and beverage purchased at the Arena may be consumed on the premises'

Pretty sure if it was me and security tried to forcefully take it, id have resisted and it would have gone further (If they didnt allow a refund)