I found the below sample on Monmouth Beach near Lyme Regis and I am unsure if it is a fossil or simply beef limestone. The beef limestone is from fibrous calcite layers within a shale (known as shales with beef). For those that are not familiar with the area the local geology consists of marine limestones, shales and mudstones of Jurassic age which are highly fossiliferous.
Apologies for lack of a scale, it is 3 cm high and 2 cm wide, rounded like a tooth with a prominent rim around the base. Part of the back of the sample is flat as though it has been broken.
Thanks for looking and please let me know if you would like any further information.