The English system is similar to what we have in Australia.It's...

The English system is similar to what we have in Australia.
It's not a case of "someone" giving rights to their land for 30 years for a fee.

The landowner does not own the resource beneath their land. It is the property of the Crown. The relevant government department will issue a petroleum lease for a fee and charge a royalty on production. If the land is privately owned the gas company will have to negotiate compensation for access and to make up for the loss of production/amenity for the landowner.

The lease allows extraction of the gas and it can be sold to another operator or, when production finishes and the site has been rehabilitated it can be relinquished. The government department will probably charge a security bond to hold until satisfactory rehabilitation is completed.