Bo'ness Pottery, the pottery industry of Borrowstounness 1766–1958: http://bonesspottery.co.uk/

Denton Antiques, Kensington Church Street (select the 'miscellaneous' category and type 'plaque' into the search function): http://www.denton-antiques.co.uk/

Martyn Edgell, antique English pottery: http://www.martynedgell.com/

Barbara Gair, Castle Antiques: http://www.barbaragair.com/

Gray's Pottery website:  https://grayspottery.co.uk/

John Howard, antique pottery: https://www.antiquepottery.co.uk/

The Maling Collectors' Society website: http://www.maling-pottery.org.uk/

Maling Market: http://www.maling-market.com/

Mission Hall Antiques Centre, Barnard Castle: www.missionhallantiquescentre.co.uk

Northern Ceramic Society: http://www.northernceramicsociety.org/

Pickleherring Antique British Pottery: http://www.antiquebritishpottery.com/

Elinor Penna, Staffordshire pottery: http://elinorpenna.com/index.html

Myrna Schkolne, early Staffordshire Figures:  http://www.mystaffordshirefigures.com/index.html

Stephen Smith, Faked Sunderland Lustre: will eBay ever act?: http://www.mystaffordshirefigures.com/fake-alert.html

Sunderland Museum & Winter Gardens, Tyne & Wear Archives & Museums: https://www.twmuseums.org.uk/

Sunderland pottery history website: http://www.searlecanada.org/sunderland/sunderland142.html

United collections, including Staffordshire plaques and Tyneside transfers: http://www.unitedcollections.net/

Earle D Vandekar of Knightsbridge Inc: http://www.vandekar.com/

West Sea Co, dealers in nautical antiques: http://www.westsea.com/

Willett Collection of Popular Pottery, Brighton Museum: https://brightonmuseums.org.uk/discover/2015/02/26/willett-collection-of-popular-pottery-2/