I’m personally convinced the most you should spend on a bottle of Champaign is £10-15 on a bottle of Cremant De Bordeaux rather than Champaign. There will always be occasions when a bottle of Champaign is called for, but you likely have one that someone gave you as gift for that.
Most Cremant is as good as or better than Champaign at 2-3x the price.
Most Cremant is as good as or better than Champaign at 2-3x the price.
We are particularly fond of this one: https://www.ocado.com/products/m-s-cremant-de-bordeaux-blanc...