Thanks for the reply - its really odd - It's something I've done somewhere to do with link formatting - as the iPhone sees a phone number as a link.
I can get around it by adding a tel:01242656565 to the href - when I do this the number displays in dreamweaver smaller and then I can reformat it as a link by using an inline style - this fixes it - but when I create a brand new page and try to replicate the problem, numbers behave perfectly on the iphone so It's something I've done - just can't see what.
I can send a page example but its an adult themed page I'm working on - -- -- Nothing really bad - just soft but nsfw none the less