Marriage Nugent - Campbell

[Wheelie]

I don't know if anyone can help but I am trying to find the marriage of Brian NUGENT of Ireland and Christina CAMPBELL of Scotland.  I don't have any precise locations for them.

Brian was also known as Bernard.  He was born around 1800.  Christina was born around 1814.

I originally thought they had married in Merthyr Mawr, Wales but now believe that they married in Somerset around 1831.  Their first child Mary was born either in Somerset (but I don't know where) or Merthyr Mawr, depending on which census you look at, in 1832.

Any help or clues on where I could find out any more info would be greatly appreciated.

Thanks