The unroadworthy element is covered under separate legislation and it would be interesting to know if these faults, either singularly or in total, meet the standard to be categorised as such.
I don't know, but reading around the subject, I would take the view they don't. There would need to actually be a physical fault to be unroadworthy. However, if I was stopped at the roadside and the examiner said "if it wouldn't pass an MOT, it shouldn't be on the road", then I'd find it hard to disagree with that logic.
"The Road Traffic Act 1988 makes it illegal for any person (including private individuals) to sell, offer to sell or supply, and expose for sale an unroadworthy vehicle. If you have a vehicle on your forecourt that is unsafe or unroadworthy you could be committing a criminal offence."
" a motor vehicle or trailer is in an unroadworthy condition if—
(a)it is in such a condition that the use of it on a road in that condition would be unlawful by virtue of any provision made by regulations under section 41 of this Act as respects—
(i)brakes, steering gear or tyres, or
(ii)the construction, weight or equipment of vehicles, or
(iii)the maintenance of vehicles, their parts and accessories in such a condition that no danger is or is likely to be caused"