At the side of the race circuit, Lady Helen was “his stopwatch” – F1 legend Sir Jackie Stewart often praised his wife’s ability to time his laps to the millisecond with unfaltering accuracy.

But following a dementia diagnosis in 2014, her “razor-sharp mind” is slowly fading away. She can no longer walk without aids and requires round-the-clock care at their home in Switzerland.

The Scottish motor racing champion told Scotland Tonight on STV he wants to see dementia research operate at the same blazing speeds he used to produce on the track.