Hi Justine,
My suggestion would be to start with the council (Elmbridge Borough Council, based at the Civic Centre off of Esher High Street). I know councils have a bit of a bad reputation generally but on things like these I've always found them helpful and professional. You can contact the cemetary manager via a web enquiry form on the web page - here's the link:
http://tinyurl.com/33xt4hh
or just call the switchboard (01372 474474) as asked to be put through.
Hope that's of some help.
Mike
MIKENEWS