Hi,
If I've looked at the right family in 1881, then they're still at the same address in 1891,
1891 RG12/4008 f.132 p.12 Middlesborough
11 Ash Street
Robert WHITWORTH Head Wid 46 Draper Lancashire Oldham
Mary Daur Unm 20 Yorks Audsley Leeds
George J Son S 17 General Labourer " " Middlesborough
Lillian Daur 9 Scholar " " " "
The only birth for a George J WHITWORTH c.1874 Middlesborough I can find is,
George Jefferson WHITWORTH Mar Q 1874 Stockton v.10a p.72
Then there is this marriage, I think 'Millie' could be the pet name of Amelia,
George Jefferson WHITWORTH Dec Q 1900 Leeds v.7b p.740
other names on page,
Amelia ROBINSON
Jane Ethel ROBSHAW
John HOUGHTON
If that is him, then this looks like them in 1901,
1901 RG13/4193 f.40 p.21 Hunslet
3 Leasove? Street
George J WHITWORTH 27 Stalworks Train Rail Driller Middlesbro Yorkshire
Amelia 28 Farnley " "
Regards
Daisy