best thing you can do is steer a conversation to wine and find out if he prefers dry, medium or fruity.....if you dont find out what he prefers, you could spend £60 and still get one he didnt like....
if he likes dry, to be honest go with Sancerre or Chablis, its difficult to knock those two for dry wine, both can be had in supermarkets for around £8-10 a bottle and taste fantastic, if you go to a wine merchants you'll probably pay around £15 for a similar quality.....supermarkets buy HUGE....wine merchants just buy big....
if he likes medium, well, it depends, a lighter Sauvignon blanc can be interesting but its difficult as some will taste dry, stick to the Aus/kiwi ones to be honest for the most part.....again, £8 in a supermarket is going to be as good quite often as £15 from a wine merchant.......
for sweet, well tbh i cant say too much as i just dont go for sweet wines myself, sometimes i'll indulge in a dessert wine, but not normal sweet wines so i cant comment.....
i tend to lean towards dry myself....
one key thing is to look at the label, if it says consume within a year of purchase then best to avoid as its likely to be a fairly cheaply made and processed wine.....you often find the main names that are sold by supermarkets say this purely because they know the supermarket storage conditions are not ideal for keeping wine a long time......this is where a wine merchants will do you better as they are more likely to keep the wine in a suitable way so it can be kept for a while.....but you tend to pay a bit more for the privilege....
if he is a wine lover, then get him a couple of £8-10 bottles from a supermarket and he will most likely be happy as they are usually pretty decent......if he is a wine snob, well, get him a £20 bottle from a merchant and let him love or loathe it.....he'll be happy either way in that instance...lol