[3] He sought charges of up to £45,000 from residents of Peterstone for access across pathways and verges claimed through the title of Lord Marcher of Trelleck.
[4] However, his activities have been curtailed by a change in the law in 2005 meaning that no-one can be charged for access across common land if it can be shown that they have already done so for twenty years.
Claims to extensive sections of foreshore under the title of Lord Marcher of St. David's delayed the planning process for a marina in the town of Fishguard.
The judge ruled that Roberts only had moiety of wrecks along stretches of the Pembrokeshire Coastline, as Lord of the Manor of the City of St David's.
[8] In 2008 he lost another legal case, claiming rights over parts of the Severn estuary under the title of Lord Marcher of Magor.