it dosent look like any of the fossils you get from that area.
it is most likely a nodule of tougher rock in the softer darker rock
not a fossil but a sedimentary structure.
but your daughter is on the right lines, keep looking and she will find something!
has anyone else got ideas to throw into the mix? open to all suggestions lol -- its taking up space and in my front room if it isnt anything i can put it out in the garden -- thanks