Nige.... check out these pages on the 'Camunian Rose' motif of Valcamonica in Northern Italy... there's a remarkable similarity to the Ilkley Moor Swastika Stone. Your pretty much on course with the idea of aranging a pattern around a cross of nine cups. Maybe brought over by Roman troops recruited from the area stationed at Olicana fort in Ilkley. The fylfot motif was also a symbol of Brigid and as much of Yorkshire was occupied by the Brigantine tribe... who knows?

http://rupestre.net/tracce/FARINA.html

http://www.geocities.com/Athens/2996/camros2.html

It's also reckoned that the 'hook' part of the Ilkley motif points towards the summer solstic sunrise. I remember reading something somewhere once stating that it was based on the same groundplan as Stonehenge????? Guess it's just as plausible as the theory that its a Victorian hoax!