Amazing quality mechanical keyboard for good price. I've bought mine few weeks ago and I can't imagine going back to any of my old keyboards.
The deal is on three types Cherry MX switches (brown, red and blue). If you don't know what is it, this article explain it very well: http://www.keyboardco.com/blog/index.php/2012/12/an-introduction-to-cherry-mx-mechanical-switches/
• Compact design ideal for FPS gameplay.
• Solid-steel frame.
• Ultra-portable design with detachable cable.
• Cherry® MX mechanical keys.
• Convenient USB charge port.
• Game mode, 100 per cent anti-ghosting and full N-key rollover function.
• HyperX red backlit keys with dynamic lighting effects.
• Additional coloured, textured keycaps for FPS gameplay.
Collection from Bolton store is available, lowering price to £79.99
If you want to buy one with blue switches, amazon.co.uk has it for £1 less: https://www.amazon.co.uk/dp/B01M7RA0W3/