Thank the stars you all know what you are talking about!!! I don't even understand most of the acronyms!
I did ask the researcher from the WSHC where the burial records were kept. I will let you know if I hear anything back.
Not sure how helpful it is but, in the meantime, I did find the following on this website -
http://www.genuki.org.uk/big/eng/WIL/Chittoe/#CemeteriesIndexes and registers of the parish church of Chittoe, St Mary:
(for earlier entries see Bishops Cannings, Bromham, Calne and Chippenham)
WSRO registers: Chr 1846-1912, Mar 1846-1978
IGI Chr 1846-1875 Batch C054331, Mar 1846-1880 and some to 1884 Batch M054331
Wiltshire Index Service Burials 1846-1858