Hi Jackie
I wonder if this is Thomas and Alfred in 1901. It looks like Mary Ann possibly died and Thomas remarried as there is quite a big age gap between the older and younger children.
1901: RG13/1872 Folio 68 Pg 11
2 Webster Cottages, East Dereham
Thomas Guymer Head 45, Roadman (labourer)
Alice Wife 44,
Alfred 22, Plowman on Farm
George 18
Robert 16, Ag Lab
Esther 14
Alice 6
James 3
Gladys 2
All born East Dereham
Steve