The run is approx 30 meters.
I will have to purchase either 30m of 10mm² 3c SWA and a consumer unit for the garage.
Or, 30m of 1.5mm² 3 Core for lighting, 30m 2.5mm² for heating and another 30m 4mm² for power.
Not a huge issue I admit, but if there was a way I could use the materials I have...