I videoed the Great Northern Diver, that I found on 15th December, on Saturday 19th December and it looked decidedly unwell. It was later caught by Seven Trent Wardens and found to have fishing tackle wrapped around its neck and bill. It was released but wasn’t seen again until 23rd December and, thankfully, looking in good condition.
I watched it on the afternoon of the 24th December and then had a good close encounter with it on the morning of the 25th December 2020. It was looking very well and obviously recovered from its ordeal with the fishing tackle.