The trouble is that its going to affect one of the few growth areas of the British economy, the small brewery.
The UK has seen an explosion in these over the past few years & many of there products range in strength from your standard 4/5% up to Imperial Stouts which can be over 10%!
They come in 330ml bottles and currently are more expensive but only a circa £2 more than say a 3.5% Pale Ale in a 500ml bottle. The Pale Ale could be drunk all night where as its unusual for someone to drink more than 1 Impy Stout in an evening but the cost will be about double.
So, is it really the strength of the product rather than the amount of the product that is the problem?