Hello dot,
No,sadly not Harry Corbett's grandson.
This is from Wikipedia:~
In the late nineties, Matthew Corbett retired, marking the end of Sooty and Co. (based around the idea of the Sooty gang running a shop that "sells almost everything") and essentially gifted Sooty to then co-star Richard Cadell, who presented the show through another five series, at first under the name Sooty Heights, then under the name, Sooty, both set at a hotel. He was joined in these by two female co-hosts, starting with Liana Bridges from 1999-2000 who worked in Sooty and Co. in the same period he did, and then Vicki Lee Taylor from 2001-2003, who had previously worked on The Queen's Nose.
Sooty is frequently shown on the CITV Channel in the UK, usually weekdays at 3pm.
In June 2008, it was announced that Richard Cadell had bought the rights to Sooty, having been put up for sale by HIT Entertainment in October 2007. Plans for three new TV show formats are underway, with a reworking of one of Matthew Corbett's stage shows due to tour early next year
and this:~
http://en.wikipedia.org/wiki/Richard_Cadell
http://en.wikipedia.org/wiki/Matthew_Corbett