Not necessarily right..... When the original date was set it was supposed to roll on but they didn't roll it every year which is why it is now 32 years when originally I think it was either 20 or 25 so at least 7 years haven't rolled on maybe 12.
Was originally a 25 year rolling exemption, was then frozen in 97/98 but has now started rolling again at 40 years.
https://www.gov.uk/government/publi...0-year-rolling-exemption-for-classic-vehicles