Richard - by Robert Tarling Newport pottery
Tom - Richard is correct. this is one of my late father's pots. However it look more like one from his Kersey Pottery days rather than the later Newport Pottery time.
Adam - Thank-you both for your help - much appreciated.
Mary Knight - So grateful that you have cleared up a very old mystery for me. I've been trying to find out whose mark this was for years and years. I am very fond of the few pots I have collected with this mark. Thanks.