Bear in mind that for Lincolnshire events it's worth getting the certs from Lincolnshire Registration Services (based in Lincoln).
They hold the original registers for the county and supply scanned copies of the register (so all signatures etc are original), charges are the usual £7 and turnround is usually 3 days, sometimes quicker.
Orders can be placed by phone or online via the council website (use the "do it online" option). Alternatively postal applications can be made to the adress given below.
For birth and death certs supply;
Name
Year of event (date if known)
Place (or district)
Additional info can also be supplied if known to narrow the search.
For marriage certs you must also add the name of the marriage venue (eg church or chapel name).
Certificate Applications
Lincolnshire Registration Services
PO BOX 760
Lincoln
LN2 5WG
Tel 0845 330 1400 or 01522 782244
http://www.lincolnshire.gov.uk/section.asp?catid=14980&docid=44541