It's not about driving on the left (or right for that matter).
UK Type approval Certificate of Conformity....Indicators on the left of the column for new UK spec cars, Speedos in MPH, stricter emmision controls etc.
(Originally when Japanese card were imported to the UK; 50+ years ago, they had indicators on the right).
Each country has its own Type Approval Certificate of Conformity including Australia. 🙂