An exemption from certain rules available only to rich and/or politically well connected people.
Mark didn't need to wear a mask in his taxi because he had a Cummings exemption.
Dorothy travelled to her second home for a weekend break despite the lockdown as she knew about a Cummings exemption she could use as an excuse.
George spent £2000 on flights home via safe countries to avoid quarantine, taking advantage of a little known Cummings exemption.