Perhaps someone can assist here?
While watching the May 2017 broadcast, it struck us how similar G Jackson looks (while sitting and wearing his waist coat) to the Muppets character Prof Bunsen!!!!
Perhaps someone with better computer skills can upload the pics side by side?
Google images shows a pic of Prof Bunsen in fact there is a great one of him in a waist coat. Then find a G Jackson screen shot from the May 2017 broadcast...
Cheers!