Hello Graham,
Do you think your Edward Atkins could be this one?
Edward Atkins married Mary Clemson 7th March 1821, Holy Trinity Church, Coventry
If so, I can try looking at the register copy to see if any more information is there.
In case this is the right one, there is also this information:
Mary Clemson c 17/7/1797 Holy Trinity Coventry, parents George and Mary Clemson
George Clemson, m Mary Basley 29/1/1792 Exhall ( near Coventry)
George Clempson c 8/11/1772 Bickenhill Warwickshire, parents John and Margaret
John Clemson m Margaret Bach 27/12/1779 Knowle, Warwickshire
John Clemson c 25/5/1746, parents John and Elizabeth
John Clemson m Elizabeth Priest 26/12/1743 Hampton In Arden, Warwickshire
Hope some of this is useful,
Sally