Lavernock pleistocene stuffs

[Enafter]

In the past couple of months, I'd been to lavernock quite a few times looking for fossils. 

Usually each session would produce some nice assorted bits of bone and ammonite fragments, nothing too out of the ordinary.

But lately, I've began finding quite a few bits of pleistocene bone there. 

I checked online but nothing really came up regarding pleistocene bones and etc, in Lavernock.

I looked online and something came up which said that the bristol channel used to be a glacier?

Which got me thinking that there's probably a pleistocene deposit at the bottom of the bristol channel which slowly washes bones ashore as I've only really found the bones on a very, very low tide.

But I honestly don't know.

Does anyone have any idea as to why I'm finding  these bones at Lavernock?

Here they are if you're interested:

P1 and P2 are various bones, not sure about identification.

P3 is a Bison tooth next to a deer tooth. 

Thanks!