you neglect to mention whether the downlighters are mains or not so earth is only needed at the terminal block for the mains to the transformer if they're 12v..
No hoods but presume they don't need them being fire rated (They are in the ceiling of a first floor flat, two storey block, they project into roof space under the insulation).
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local