There was a lot of those sorts of things about then.I've got a bottle of Ushers Celebration Ale from 1981. Unopened. Brewed to celebrate chaz n di's wedding. Fink it might be off by now so not gonna drink it. Yet .
My ex-wife and i got married in France early July 81, on our way back to my Dad's place, in the car all decorated with "just married" stuff, we stopped in a pub for a drink.
A beer rep was there and he asked whose car it was.
"Ours" sez I.
congrats etc followed and he presented us with two bots of their celebration ale.
I think we drank it soon after, maybe on their wedding day!
It was very nice!
As yours has been in the bottle and will have prolly been pasteurised, at least, it might be OK.
Does it have a big deposit?