I can now add some futher information from my 3x Gt-grandfather's marriage certificate (married in London in 1855)which I obtained today.
Daniel Charles Leyden birth 1821-22 in Ireland, Occupation: acccountant. His father is given as: Charles Leyden occupation: farmer.
Looking at the Griffiths Valuation and the Tithe Applotment the only Charles around at that time to be Daniel's father is a Charles Leyden living at Ballyurra, Kilrush, Co Clare, obviously this cannot be taken as gospel and more proof is required.
If you think you can connect with this line or can help with BVRI info for Daniel or his father Charles please get in touch.