looking to move some external 30W LED floodlights, what cable do I need to go with these?

http://www.screwfix.com/p/teetube-ip68-3-pole-in-line-cable-joint/92911

Are they wall mounted?

Fits 5-13mm cable.

yes wall mounted,
yes know the fit

from the millions of choices in the screwfix catalogue what is the recommended cable for an external wall mounted fit?

thanks

what is the recommended cable for an external wall mounted fit?

Well personally I’d just buy cores and stick it in 20mm plastic/metal conduit. Any cable will degrade over time from UV (even supposedly UV stable stuff). I also think it looks neater / more professional.

I would just have used 1.5mm twin core or 3 core and waterproof junction boxes. You’ll need to use something with a round profile ideally.

It depends on the environment and whether you’re crossing any gaps between buildings.
Footflaps suggests a sensible default, but it really does depend…

PVC twin n earth shouldn’t really be used outside, how longs the run?

About 10 metres