Firstly I know this won't be in everyones budget and won't be up everyones street.
However, except for the limited Kwik Save deal, this is the cheapest I have seen Veuve Clicquot for, in a long time.
Essentially when buying a case of 6 bottles from Tesco Wines and using the £30 off £150 spend code of XXPLY7 - you get 6 bottles of this champagne for £25.00 each.
On top of that you get free next day delivery on orders over £50 at the moment, this is the cheapest deal I have seen for this.
Also Topcashback of 2.1% brings it down a little further still.
Hope this is helpful for some of you out there.