Places for solar panels before you hit the agricultural sites:
1. Domestic roofs (@NickfromWales) . Receive annual "wayleave" payment for 5 years
2. Commercial roofs. Or the owners lose all tax exemptions they are eligible for, or pay a yearly fine/tax for non-installation payable per m2
3. Every single car park in the country to have "car ports" installed. Similar fine/tax situation as per 2.
4. Warehouse walls - vertical panels for improved winter generation. Possible tax incentive for this.
5. Vertical panels along motorways, dual carriageways and railway lines
6. Farmers to receive subsidies for installing on barn roofs and vertical panel at edges of fields (@JohnMo)
I have seen articles, but not researched their voracity, about the solar panels on agricultural land being installed on higher frames allowing crop growth to continue. The story headlines imply an improvement in crop yield. As I say not sure of the truth of the story.