The Government Says

Dual marking vehicles under the GB type-approval scheme

Dual marking vehicles under the GB type-approval scheme
Local copy of letter-an-explicit-presumption-in-favour-of-alignment.pdf
Local copy of dual-marking-vehicles-under-the-gb-type-approval-scheme.doc

https://www.gov.uk/government/calls-for-evidence/dual-marking-vehicles-under-the-gb-type-approval-scheme

seen at 14:47, 18 December in Policy papers and consultations.