These are impressive finds but you should tell us more about the history of the site. I have no idea about the coin but the fossil looks like a dragon fly!
The field is boarders an old Saxon/roman village, we've pulled Roman coins out of this field and parts of Saxon brooches, weve unearthed some really interesting relics on here.
Rob you should PM Crusader, he is on your side of the pond and he does a lot of Roman digs, if it is Roman or English he is probably who will give you an I.D.
Welcome Rob,
I don't know anything about Roman coins, but that one is very cool.
Your fossil looks like a Echinoderm or what we call a Sand Dollar.
Here's a pic pulled from the web.
I made an interesting discovery a few years back. Many landscapers sell creek gravel as a smooth alternative to limestone. I live along a small creek that runs into a major river about 4 miles away.
There is a calm backwater just shy of the river where they have mined "creek gravel" for years. The stuff is loaded with fossils of ancient worms plant stems and all kinds of Permian stuff.