Hi, this is our connection as far as I can make out.
My ggg grandfather was John Allwood, his father was Henry Allwood b1802 Henry was the brother of Samuel Allwood(your Samuel Senior b12/8/1798. Samuel and Henrys father was William Allwood and Mother Elizabeth Fetherstone. The parents of William Allwood were James Allwood and Alice.
Your Samuel Senior seems to have been one of 12 children by William Allwood and Elizabeth Fetherstone.
Still got to prove everything but the link seems to be there.