I dont know about England, but there are a small amount of Rorke's in Australia. In fact my brother is called Robert Rorke...

Looking for Andrew Rorke who married Winifred McMannus sometime late in the 1700's, their first child Andrew Rorke was born circa 1818. This Andrew Rorke married a Mary Mullrayne (Mullraine) and their first child Helen was born in Ireland 1839. The moved to Edinburgh Scotland sometime between 1839 and 1854.