I worked for them when they were in the process of moving from the old yard to the new one by the Thanet Way. This would be around 1990-ish I suppose.
The story I heard was that one of the brothers was killed, but otherwise the accident was as you describe. Sadly, the two remaining brothers, Jim and Sandy, fell out in a petty squabble over money and do not speak to each other anymore, despite the fact that Sandy runs the Renault dealership in Young`s yard.
Jim was a real character. Here`s a story from the days when the yard was in Dargate.
Jim had a son, Jeff, who had a moped. Like all 16 year-olds, he rode it with more enthusiasm than skill.
One day, he came hurtling through Dargate with his mate. Outside the pub were a group of morris-dancers doing their thing. With a hey, nonny nonny and all that.
Jeff and his mate did not slow, and sent them leaping for their lives. One of them recognised him, and went stomping up to the yard in a rage.
As he did so, the bells on his jacket jingled merrily :D:D
He got to the yard, and confronted Jim. He let forth his rage.
When he had finished, Jim stroked his beard and said…
“Hmmmmm. I see what you mean. I`ll tell him to slow down. After all, you never know when you are going to come round a bend and come across a group of grown men dancing in the street in their pyjamas”
Vince