I've made several visits to the Southwest London area, where everything is "just off the A3" :-)
LOL! Yes indeed, we are, of course just off the beloved A3 main road turning for Kingston

Both New Malden and Sunbury are very close.

Of course, everything's changed in the last 20 years since you visited.
We now have lots and lots of new roads ... that are just off the A3

Russ