Good evening, I’d like to ask which winter tyres are recommended for the a3?

Personally I recommend the same tyres you use in the summer. In this country we don't have the extreme winter conditions that would justify fitting a different grade of tyre.

I agree with Cliff for the middle to southern part of the UK.... perhaps different right up north or Scotland.

In my experience and opinion there are grip downsides to many winter and all weather types in dry and wet conditions when it isn't icy or snowing so if there is no good reason to fit them you could have worse overall grip for most of the year. They often cost more than a top quality "summer" tyre too.

If I really needed them I'd only fit the best compromise type which seems to the the Michelin Cross Climate.

 

 

Barton hardly comes into the far north category.