« Reply #12 on: Sunday 24 February 13 17:47 GMT (UK) »
I think that would fit, and place the picture c 1904 -
John aged 18
Bertha aged 14 (sitting next to her mother)
Florence 12 (back right)
Albert 10 (back centre)
Arthur 7 (far right)
Percy 5 (far left)
Dorothy 4 (centre)
And I think Bertha will be 14, as her hair is up, showing she's a grown up.

Pay, Kent.
Barham, Kent.
Cork(e), Kent.
Cooley, Kent.
Barwell, Rutland/Northants/Greenwich.
Cotterill, Derbys.
Van Steenhoven/Steenhoven/Hoven, Nord Brabant/Belgium/East London.
Kesneer Belgium/East London
Burton, East London.
Barlow, East London
Wayling, East London
Wade, Greenwich/Brightlingsea, Essex.
Thorpe, Brightlingsea, Essex