Can I just add, suffix is irrelevant when it comes to SEO, as long as it isn't super difficult to type, look like spam, hyphens etc. the only thing that truly matters, is CONTENT.
People are indoctrinated to believe .co.uk will rank better than .uk, wrong. You're just not seeing .uk ranking (much) yet as nobody has adopted it. And that my friends, is the big question.
Will it be adopted, as much as the .co.uk?
I bet if I took a competitive .uk domain now and put a website on it, focused 12 weeks intensively creating quality SEO articles and optimising the site every single day, it would be ranking just fine.
Any SEO company worth their salt would tell you exactly the same thing.
https://webmasters.googleblog.com/2015/07/googles-handling-of-new-top-level.html