From what I hear...

Richard Cadell no longer works on the Sooty show (the last series was
Series 51, two or three years ago) but he is busy producing pantomimes
and running his theme park in Somerset (Brean Park).

In terms of Matthew, he is now set to return to our screens once again,
to present a show about (I think) canal boats.

There seem to be no plans for Sooty to reappear - can't think why, I
think it was at its funniest in the last few years!