There's a lot of personal preference involved - I'd be tempted by the "Best Value" (£851), but then swap the drives to a 1Tb and 2Tb SDD, bith 870 QVO 's, up the CPU to an intel i7, drop the graphics to an NVidia GT1030 (unless you want to play games, LR doesn't really work the GPU), and drop the WiFi (as I have a wired connection to my router - which will beat WiFi in performance every time).
That bring it to £1020 - but it's really a case of looking at your budget - you'll still get a good machine without all the upgrades (I'd go i5 at a minimum though, or AMD equivalent), and if you have a bigger budget, going for 32Gb, etc is always a good option (you can also go for faster SSD's, etc).