Hello Eddie,
David White is David Jason's real name and although our mums were really good friends, he is a few years older than myself. So when I was about 7, he would have been around 11 or 12 - so at that age that's quite a difference and I suppose I would have been regarded as a bit of a pest to have around. (Funny, some folk still feel that way :-)
Yes, we do get a weekly dose of A Touch of Frost here - another wonderful show. David Jason's real life older brother Arthur (he still goes by his given name of Arthur White) also appears in 'Frost' as Ernie, the bloke who works in the basement keeping case files. He only appears now and then.
All the best,
renig