Thanks kmg423, though I'm not sure about your adive on Cenomar and CNI, the British Embassy in Manila kept my British issued CNI when we went there to get the local CNI so I really hope they don't want to see that (well technically they already have it but...). Not sure if we still have the one the embassy issued or whether the town hall kept that one when we applied for the marriage licence! Either way they are out of date as we are now married anyhow.
So the local registrar in Butuan should be forwarding the marriage certificate automatically to NSO should they? I assume this must be the case or NSO wouldn't be able to issue accurate cenomars. Oh well guess the wait goes on....