On the way down towards Henly's Corner. I managed to get to the inside lane where cars were queuing for the lights. The car kept stalling. But, I could get second gear, just. And, by keeping the revs high and keeping moving at all costs, I was able to turn left at the lights, head up through Hendon (crossing Hendon Way was not fun) and onwards for a mile to my sister's house in North Finchley.
I was an interesting thirty minutes. Felt like four hours.