repost 10 times Bro! https://www.hotukdeals.com/deals/apple-macbook-air-133-256-gb-ssd-2017-64801-currys-3198312
I love my MacBook Air and have had it for just over 2 years. My only gripe is how bad the screen is. This is 2019. Personally I would not be going for this deal.
As others have mentioned, the old Macbook Air is now quite far past the point of consideration. I had one from 2013 to 2016, my Mrs got one as a gift 18 months ago, and I currently use a MBP (as well as Windows machines). Everytime I need to sort an issue on the MBA it's really obvious how outdated it is. Even running W10 natively it's still really painful using that screen / trackpad (which used to ba a class-leader). I'd echo what's been said, if you're budget conscious, then get a good robust Windows ultrabook type machine instead.
As someone else mentioned below. Look for a windows laptop that meets your spec for cheaper. Will work as well, just may not last as long. Apple products for me have always stood the test of time. Who knows!