Original sentence: Proponents of British beer say that it relies on subtler flavours than that of other nations, and these are brought out by serving it at a temperature that would make other beers seem harsh.These days, it is as common to find it sold in bottles or drawn in a pub from a conventional carbon dioxide-driven tap.Where harsher flavours do exist in beer (most notably in those brewed in Yorkshire), these were traditionally mitigated by serving the beer through a hand pump that mixes air with the beer, oxidising it slightly and softening the flavour, but this is now a hallmark of real ale and is not typical of how beers are generally served in Britain
Edited sentence: British beer relies on subtler flavours than that of other nations, and these are brought out by serving it at a temperature that would make other beers seem harsh.Where harsher flavours do exist in beer (most notably in those brewed in Yorkshire), these are mitigated by serving the beer through a hand pump that mixes air with the beer, oxidising it slightly and softening the flavour