Hi not very clear, but I think you need to put 3 reds in spare block not connected to your light, yellow is sw. wire to go in with the brown of light, blue of light goes to blk/blue bunch of Neutrals, the green/ yellow striped is the fittings Earth which goes to your 'large ' earth which is in fact sleeving over 2 bare earth wires one from each cable, if still unsure electricians arn't that dear, & lighting ain't always that easy!!!
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