As others have posted, it depends on whether they were laid down or upright along with temperature (wine/champagne likes a constant temperature not fluctuating)
Ask some friends round, pop the corks and taste 🥂🍾 enjoy (hopefully)
Hi ladies I have been clearing out the cupboards and have discovered several bottles of champagne. There is no drink by date and I wanted to ask if anyone knows how long it can be kept for? Many thanks