I am a member of the National Council for Metal Detecting known as the NCMD.
If treasure does get found on your land the normal procedure is that its handed in under the treasure trove laws and the Landowner and the finder share the value 50/50.
I am also a member of a local Southampton club called Pastfinders who are always interested in finding new land to hold their digs. The club offers £10 per person per day for the privilege to detect on your land.
If you maybe interested in giving myself permissions to detect on your land or you maybe interested in allowing the Pastfinders club access to a club dig then please call me on...
01202 483411
Very best regards all
mrix