I hope it will be helpful if I present further concise information on the programme from a selection of websites:
From 'Radio Times': "To coincide with the publication of upcoming sequel Peter Pan in Scarlet, Alan Yentob presents a documentary which explores why JM Barrie's character has such lasting power and mythical status and looks at the secret behind its eternal appeal. He goes in search of the real JM Barrie, visiting the remote Scottish island of Eilean Shona, his home town of Kirriemuir near Dundee, Black Lake in Surrey where Barrie played, and Kensington Gardens, where Peter Pan was born."
From Michael Rosen's website (Michael appears in the programme): "BBC Imagine Documentary on Peter Pan and Peter Pan in Scarlet, narrated by Robert Glenister, featuring Daniel Mayes as Peter Pan and Kate Mayberly as Wendy. It's a documentary by Alan Yentob covering the relationship of J M Barrie and Great Ormond Street Hospital, the history of Peter Pan, the genesis and making of Peter Pan in Scarlet, following Geraldine McCaughrean over the last few months in the build up to publication of her sequel."
A slightly jaundiced review by David Chater in 'The Times', which also contains errors such as telling us that JMB's brother David died by drowning - which seems to indicate the low level of concentration Chater maintained while viewing this programme! - can be read here: http://www.timesonline.co.uk/article/0,,26430-2407691.html
The programme unfortunately did contain a few errors, but, having checked my recording of it, these did not imclude the one committed by Chater.
If I come across any more useful reviews of the TV programme I'll mention them here.