Spotted this cannonball on the Holderness coast last year, if you are coming over to the East Yorkshire Coast then I don't think you could find one as well presented on the beach as this one.
Can't remember Dan!
Usually you can split 10 of these concretions and if you are lucky you will find something in one of them, but I have had good days were the fossil find ratio is better than usuall.
I hope you don't mind but I have attached an image of one I found that did not need splitting to see there was ammonites inside of it.
Got this one recently with cross sections of ammonites showing around the nodule.
Hope this helps to spot them when you go to Whitby or anywere on the Yorkshire coast.
Nice find. In the spring I'm going fossil hunting in Redcar because I've always wanted to find a gryaphea, and they are more common in Redcar. I've also heard even though the fossils are often fragmentary they are very common in Redcar.