hi,
i do not know if this is of any help, but i have
today received a copy of a birth cert,for my family tree, for some one in liverpool,
info that came with it as follows,[via lancashirebmd site]

General Register Office
PO box 2
southport
merseyside
PR8 2JD

tel: 0870 243 7788
fax: 01704 550013
email:certificate.services@ons.gov.uk
regards yvonne.