are those the same keyboards? set is just 2 more pounds 
set: http://www.overclockers.co.uk/showproduct.php?prodid=KB-115-LG
k350 keyboard: http://www.overclockers.co.uk/showproduct.php?prodid=KB-164-LG

set: http://www.overclockers.co.uk/showproduct.php?prodid=KB-115-LG
k350 keyboard: http://www.overclockers.co.uk/showproduct.php?prodid=KB-164-LG