Time for an update to my historic track guide - up to date as at 15 June 2026. Any errors are mine and I will fix them if pointed out politely and with evidence (e.g. link to more info). My definition of "historic" is anything from the dawn of time to the 2010s. I am treating the 2020s as "modern" present-day era. It's arbitrary but so are alternatives. I hope its readable - let me know if not and I will try to fix. Note that if you are logged in you can click on it for a clearer view. If you like visual guides, check this out too: Formula Vintage to Formula Ultimate: a visual guide