2013 photos & vids here
eff37 on Flickr
Shame there was no mention as they build a purpose built hide and visitors centre around the Bittern during lock down.
https://www.visitleevalley.org.uk/wildlife-discovery-centre
That's a great link thank you ... I don't think they ventured into the park area on the programme ... can be seen on BBC iplayer!
If you have any more pics of the wildlife in the park, or elsewhere, we would be pleased to see them as we don't have a poster from that area!