As I understand it if I bring back in excess of 3200 and get stopped by customs they will want know that they are for my own use.
Quote "If you are bringing in alcohol or tobacco goods and we have reason to suspect they may be for a commercial purpose, a Customs officer may ask you questions and make checks, for example about:
■the type and quantity of goods you have bought
■why you bought them
■how you paid for them
■whether all your goods are openly displayed or concealed
■how often you travel
■how much you normally smoke or drink or
■any other relevant circumstances.
You are particularly likely to be asked questions if you have more than:
3200 cigarettes, 200 cigars, 400 cigarillos, 3kg tobacco, 110 litres of beer, 90 litres of wine, 10 litres of spirits, 20 litres of fortified wine (such as port or sherry).
The officer will take into account all the factors of the situation and your explanation."unquote
So 3200 is not the most I can bring back but only the point where I may be asked to answer these questions.
In particular they should all be the same brand and for your own use,
http://customs.hmrc.gov.uk/channelsPortalWebApp/channelsPortalWebApp.portal?_nfpb=true&_pageLabel=pageTravel_InfoGuides&propertyType=document&id=HMCE_PROD_010221Steve