I've never come across that maker's mark before, but the style of the marks looks a bit Chinese Export. http://www.925-1000.com/chinex_marks.html" onclick="window.open(this.href);return false;
Thanks so much for your help. I see what you mean by looking a bit like the chinese export marks. I was (easily) fooled by thinking as the first mark looked like a lion so it must be a british piece. Nothing so simple. Oh well at least I dont feel so bad not having found the answer myself :-)