Not sure if you’ve seen the notice but the following has been added to RSPB Snettisham’s website:
Important Notice! The reserve will be closed for the foreseeable future because of severe damage caused by the storm surge. The path has been badly damaged.
This is a link to a photograph showing three hides at Cley Nature Reserve: http://www.birdforum.net/attachment.php?attachmentid=475223&d=1386345453