For once I happen to agree with FF regarding the names of the residents of Bremhill. It is extremely difficult to sort out family relationships within this village. Unless you purchase the bmd certificates for events you are never going to be entirely sure who belongs to who. Even the registers can be misleading since the surnames are common in the area such as Pinnegar, Ponting, Henly and their variants. Coupled with that is the use of Given names in the same way. There may be for example 4 or 5 John Pontings all cousins. Then we have the use of the surname as a middle name adding to the mix. Since I regard Bremhill as the my family "seat" as FF regards Yatesbury as his I will eventually purchase the microfiche for the parish which may help in a very small way. But this is one Wiltshire parish hat genealogy is certainly an expensive hobby as you will no doubt need to purchase certificates to be certain.
As I said in a previous post - there are images on the Wilts OPC website of the memorial stones that remain standing in St. Martins Churchyard up to about 2010.
I have been to the Churchyard and walked around the graves and been inside the church to have a look at where my grandfather was baptised. Sadly I hadn't realised I would be involved in family history as much as I am and I did not have the foresight to take a camera. The only plaque I remember looking at was that of the Roll of Honour, since my grandfather (served), great uncle (KIA) and a nephew of my grandfather also KIA are named.
Another spanner in the works is the Moravian burial ground at East Tytherton in the parish. Some of the surnames associated to St. Martins appear their too.
Further to that Foxham which is another tithing of the parish has its own church possibly built as a chapel of ease to St. Martins. St. John's registers at the WSHC are from 1850-1911 for baptisms and burials. I believe it was never licensed to perform marriages.