Saturday 1st January 1921
Road car tax discs for obligatory display on windscreens were introduced in Britain. They cost £1-per hp. The discs had a vertical ‘expiry’ cross in the background, shadowed by either of four differing lines to note the year at a distance. Available as an annual (dual colour) or three-monthly (differing single colours) tax disc, which expired on 24th March (Spring Equinox), 30th June (Summer Solstice), 30th September (Autumn Equinox) and 31st December (Winter Solstice-or a few days later!). A flat rate road tax of £10 per car introduced in 1948.