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