Good evening folks, I'm new here but was hoping someone could help me identify my find. Firstly I'll be honest and say I'm not even sure this is a fossil. I found it this evening on a beach walk. So it was found on Skegness beach, this is on the east coast of England at the northern end of the Wash, a bay on the North Sea.
Skegness beach is mostly sand with a few pebbles and rocks. There are usually very few fossils on the beach and it's not an area known for it's fossils. Over the opposite side of the wash is the Norfolk coastline, this is mostly made up of cliffs with chalk, sandstone and flint I think, but there are more fossils in this area and some small material from the Norfolk coast does make it's way over the 15 to 20 miles and wash up on Skegness beach. This find (if it is a find) is unlike anything I've seen on Skegness beach before and is nothing like any other rocks, stones and pebbles in the area.
My first thought was it way be a horseshoe crab fossil, but a quick check on here has me thinking this is not the case. My partner has suggested a small tortoise or turtle and it certainly has that type of shape to it, I'm not sure that the photo (I only seem to be able to add one photo) truly shows the shape but it's the best I can get. The photo is of what I would describe as the underside.
Any help with identification is greatly appreciated, or advice on how to add further photos (sorry I'm really not a tech wizard)
Thank you in advance for any help.