Sorry Chris. So far my Radford's are from VA, USA. I have since discovered a copy of Samuel's will that indicates William is his grandson. Dates I have are Samuel b. 1795,
Joannah Underwood b. 1794. William b. 1848. Though I am still in search of info on this line.
Someone sent me an email stating William was the son of James Tazewell Radford and married Lydia Janney in 1823-1825. When I started looking for these people, I found a James Tazewell Radford as having married a Martha Janney, and James' parents were listed as George Radford and Marta Rigney.
As it seems that William was raised by his grandparents, I am not sure this is the right line.
Chris, if you know of any of the Radfords that came to the US, and where they came to, any help is appreciated.