Hey Fourwinds,
I went into Archaeology.ie and using the grid ref they have, i put it in the convertor you have on your website.
It changes the 12 digit ref to a 6 digit OS map reference.

I presume that it should be possible to change a 12 digit ref to a 10 digit OS map reference.
Is this correct and does any one have a convertor to do it?

I think this tomb may still be in the trees, as far as I remember I was in that clearing you were talking about and it wasnt there.
If I had a 10 digit reference and my GPS I think I would have a good chance of finding it.

Anyone help with the conversion?

National Grid Reference (E,N):

161807, 118608