Originally Posted by
20Rothmans
So is there anywhere in T5 where one can buy small bottles of wine or beer?
Yes there is at the duty free shop, indeed there is at the other major UK and rest of Europe airports too. Often you will find these close to the main till, in the queuing area, a bit like sweeties in a supermarket, I suppose. In T5 the biggest selection is in the middle of T5A departure level floor between gates 10 and 16. Perhaps unsurprisingly the basic cost is the same as the onboard prices, give or take 30p or so, however there are better value options.
In the picture above, the products are in 20cl bottles for £10, which suggests 4 drinks, so ideal for couples (ahem), and works out at half the onboard price. Mixers are generally, but not always, available at the same price as BA.