And, as I hoped and expected, we did get a tribute to John Noakes - Barney, Lindsey and Radzi all spoke warmly about him and we had a montage of clips cut to the original Barnacle Bill. Not very long, no, but it is ancient history for the audience. Just glad they did it.
Incidentally, their current competition is to design something for the redeveloped Kew Gardens and the architect said he specifically wanted Blue Peter viewers involved because he first became interested in architecture by entering the competition to design York Minster's bosses in 1986.