^^^ that was a search for PrimeBlue only - they have a far wider range of Adidas Terrex than that > https://www.keller-sports.co.uk/brands/adidas/sportsshoes/hikingboots/men/terrex/
I get all my Nike running gear from Keller Sports as they price so well.
I'm not an expert on walking boots at all, but the Adidas Terrex range look good there too: https://www.keller-sports.co.uk/sportsshoes/men/?q=primeblue
(If you're a member - costs £8/year - you get 10% off most things...
Timberland have a sale on right now - looks to be a lot of styles and sizes: https://www.timberland.co.uk/sale.html
Try these codes for extra off (works on different stuff:
10% Off all sale using offer code: THANKYOU10
20% Off selected sale items using discount code: EXTRA20