Hi @gordonisnz, when you have enabled the option "Clear cookies and site data when you quit Opera" under opera:settings/cookies, it will clear cookies and websites data on exit, but not the history.
There's an extension "eCleaner (Forget Button)", which is close to that what you want to achieve.
When you install it, pin it using "Extensions" (cube) button from the toolbar, click on its icon, select the items to be cleared and set the time period, then right click on the icon, select "Options", then check "Perform the last cleaning job on browser exit..." and click "Save".