Hi sorry you did not get a reply to your posting,I can tell you the parish church is St Marys and I suspect the ground you have found on google may well be the additional land used as a cemetery from about 1902,the burial records can be found on SEAX web site,give the site a look,you will need to click the button essex ancestor for the parish records ,see if the records have been digitised for the time you want if so ask for a look up on this site there are lots of people who have a subcription to the records or you can pay £5 for 24 hours .
Best Regards