Personally I have no idea what you're talking about when you say "BlueHDI", I had to look it up, so clearly there's an element of subjectivity here. Similarly t

Personally I have no idea what you're talking about when you say "BlueHDI", I had to look it up, so clearly there's an element of subjectivity here. Similarly things like football team colours may also come into play, so perhaps there should be a choice. That said, I have no idea whether (a) apparent social norms are actually the main problem to adoption or (b) whether the DVLA could be convinced to adopt new policies for rear-plate colours.