I noticed Halfords are still selling tax disc holders...

In much of London at least there's an ever increasing need to display
proof of payment of the council tax supplement (usually a round bit of
paper labelled "resident's parking permit"). And few people adopt my
DIY approach of "whatever tape happens to be at hand" (which I may
change now I can retiure the tax disc).
--
Robin
reply to address is (meant to be) valid