bednobs, Im really not sure what to say here. I am so sorry to hear what you are going through, i cant begin to imagine how you are feeling at this time.
Im not sure if your consultant has given you the choice of delivery now and tryin everything they can for your baby. Usually the point where a pregnancy is "viable" is 26 weeks though as baby is smaller i am not sure how they would go about making such a decision.
If baby cannot be helped and does not survive then i am pretty certain that yes he/she can have a burial at such a late gestation, plus be christened. perhaps you could talk to the vicar at the chapel in the hospital or your local vicar.
If your journey with your baby does end here then can i suggest that maybe you talk to the ladies over on here when you feel up to it.
http://messageboards....co.uk/iv-ukpblateloss Im sure they will have been throught every emotion that you are going through and will be supportive.
my heart goes out to you bednobs, i wish you all the best x