Hi there,
I've purchased 6 of these lights: http://www.screwfix.com/p/robus-fire-rated-fixed-led-downlight-ip20-brushed-chrome-3-5w/50280
I have them linked in the following way,
Feeding from an existing lighting circuit joined in a junction box (JB), I go from JB > Light 1 > Light 2 > Light...