Looking into the black "cable/hose" side conduits

A signature part of the helmet is the external black hoses or cables with multiple support points.

I've looked at these time and again, they may be different material on individual helmets, but at least one seems to have ribbing, another seems to have white markings or even writing on it. The writing may be just the gloss black ribbing reflecting light.

As seen in this screenshot however it has not only ribbing but a straight end termilal tube connecting into the end holder, possibly glued in place or more likely threaded into it.

Conduit on Claras Helmet from "Kill the Moon" with clear ribbing and thicker terminal toward the holder 

The Doctors helmet from "Kill the Moon", different helmets are made differently, this one has no terminal end tube but seems to have ribs all the way into the holder.

This leads me to believe they used a flex stem from a table work lamp. Something like the IKEA "Jansjö" worklamp.

The IKEA "Jansjö", the one standing is complete, further away is one disassembled with the LED PCB and wiring taken out and to the right is a boxed set unassembled from the store.

So being a Swede am I being biased toward the BBC propmakers using our cheap lamps, do I expect they ate meatballs and Lingonberries while working? :)
As far as I know, the Jansö wasn't being sold as far back as the first episode the orange space suit was used in.
No perhaps not this exact brand and model, but this type of table lamp using a flex conduit as stem. Perhaps earlier helmets didn't use this particular conduit, perhaps it was a rubber covered cable or an hydraulic hose. But at least two used in Kill the Moon have what closely resembles this excact flex stem and terminal.

The flex conduit terminal toward the hamp head Gouge is from me trying to pry it off the plastic head, it's loctite glued so I'll try heating it before trying again.

The flex conduit terminal toward the foot end, note the therading

At the very least it merits trying out a test on the helmet to see if it looks the part. The helmets being differently made also opens for using parts of the same flex conduit for several helmets.