OK, I've managed to get my contacts to respond with a little reminding
The RSPB wardens I know are currently using these Browning cameras. They're not cheap but the results I have seen from them are fantastic both day and night, video and stills. There are models above and below this one:
The Browning Recon Force Elite HP5 wildlife camera, available at the NatureSpy Shop. All purchases support our non-profit environmental and social projects.
naturespy.org
However, one of our county recorders tells me she has recently switched from the Browning models to this one. She says it has great performance all around with the added advantage of not needing to charge or swap batteries. Her's has been running all winter and stayed charged.
The Helarctos Solar Trail Camera - Let the sunshine in with solar charging, 4K video and local WiFi connection.
naturespy.org
I think I am going to go for the Helarctos.
BTW, NatureSpy are not the cheapest but they are a Conservation Social Enterprise and come highly recommended for their support (I have no connection with them).