Reddit mentions of Mechanical Gaming Keyboard,James Donkey 104 Key Anti - Gosting USB Wired Keyboard with Backlight Aluminum Frame for Computer PC Windows Lenovo Deskptop Laptop Tablet MacBook Gamer, and More - White

I don't know much about who sells / ships keyboards in the UK - I think you'd have to pay an unreasonable amount of shipping from the places I normally get keyboards from - so I've just compiled a few options from Amazon for you to check out.

In general, I'd recommend blue switches if you don't mind noise and want tactile feedback - but even the non-tactile reds (light) and blacks (a little heavier) clack when they bottom-out. Browns also have a small tactile bump without the click, but that bump is less pronounced. (There are many other options, but many of those aren't easily available off the shelf.)

While some generics aren't as good as genuine Cherrys, many are - and even the "worst" generics are still better than rubber domes.

My favorite brands are Filco, Leopold, and Ducky - but those usually scrape just (or much) above the £100 mark in the UK from what I can tell. Worth poking around for though, I think.

I believe Corsair and a few others have boards with numpads that delete the arrow keys instead as a possible space saving option.

Anyhow - here are a few possible options to kick off your search:

https://www.amazon.co.uk/gp/aw/d/B01CS99IYE/ref=mp_s_a_1_128?ie=UTF8&qid=1517949116&sr=1-128&pi=AC_SX236_SY340_QL65&keywords=mechanical+keyboards&dpPl=1&dpID=51PIgj4mxEL&ref=plSrch

• Non-tactile switches (generic blacks)
  
• US layout
  
• Does have numpad
  
• Novel look (alu / white)
  
• Backlit (orange, I think)
  
• £39.99 w/ free shipping
  
  ---
  
  https://www.amazon.co.uk/gp/aw/d/B015MQH59A/ref=mp_s_a_1_135?ie=UTF8&qid=1517949450&sr=1-135&pi=AC_SX236_SY340_QL65&keywords=mechanical+keyboards
  
  
• Tactile clicky switches (generic blues)
  
• US layout
  
• Does have numpad
  
• Novel look (alu / white)
  
• Backlit (blue)
  
• £46.99 w/ free shipping
  
  ---
  
  https://www.amazon.co.uk/gp/aw/d/B01N7VS653/ref=mp_s_a_1_171?ie=UTF8&qid=1517949846&sr=1-171&pi=AC_SX236_SY340_QL65&keywords=mechanical+keyboards
  
  
• Various switch options, genuine Cherry brand
  
• UK layout
  
• Does have numpad
  
• Black, but comes with some extra red keys
  
• Backlit (red)
  
• £99.99 depending on switch type, free shipping
  
  Feel free to PM and let me know if you have any specific questions along the way - and happy clacking!
  
  r/mechanicalkeyboardsuk is a great resource as well - those folks are sure to have more UK specific knowledge.