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Is it a pliosaur skull or something else?

Both of the teeth came from the White Limestone, Traditional Layer, Great Oolite Series, Bathonian of Oxfordshire, UK. Any thoughts on the identity of these teeth? Are they crocodile teeth or plesiosaur/pliosaur teeth?

Hello everyone! Here I have seven pieces of petrified wood that I need your help to identify what types of wood they may be and possibly where they might come from. I unfortunately do not have any information on where they came from and what their age is. I’ve had these pieces for many years and have always wondered about what kinds of wood they once were. I purchased them from a souvenir shop in a family theatre in Tawas city, Michigan. They were sold as “Petrified wood”. The shop had many beautiful rock and mineral specimens for sale and they were selling many more pieces of petrified wood each year. I first assumed that they were from the well-known Chinle formation in Arizona, Yet I later noticed that these pieces are different and realized that there are many other formations throughout the country that bear petrified forests from varying ages. These pieces of petrified wood are beiger and darker compared to the often red and colorful crystal characteristics of Arizona wood. The vascular pore-like texture on the ends of my pieces are what stood out to me and I have a feeling that they might be that of fossilized Angiosperm wood. If so, they might be from anywhere between the Miocene Epoch to the Eocene epoch. Yet, I am completely not certain and I need your help (if possible) to ID what wood type these pieces are (Angiosperm or Gymnosperm wood) and hopefully any ideas or clues of where they may be from and of their age. Take a close look at all of the pictures of these pieces to see the details. Zoom in if necessary. I hope they are helpful and let me know if you need better quality pictures.