Santander end of fixed term

Hi Guys,

Later in the year will be ending our fixed term, so I've been checking out various mortgage deals - however Santander don't publish existing customer rates/deals on the web.

Before I call them I wonder if anyone has had experience, and whether their retention deals are in general any good? (ie. better or worse than new customer deals?). House is worth 250k with LTV of around 40%.

Thanks.