Have you ever needed to search for a body in the water? I have, twice-one occasion my officers found the person, the other, a dog walker found the poor chap a mile or so down the river tangled in reeds...
Its not as easy as people seem to think.
My force had a handful of divers. Lancs will have more but even so a body will move, sink, float up-and often get stuck somewhere.
The media feeding frenzy around this case has been frankly sickening .
People also get confused-the media don't run the investigation-the police do.
In my role as a Response Insp I'd have numerous missing persons -a number high risk, every single shift, plus all the other demands to manage with meagre, over stretched resources.
I expect Lancs with self refer to IOPC.