Jon's paternal grandmother were the Biggs, who were originally from the Hertfordshire area and moved to London in the mid 1800's.
The Johnson's originally from Crawley in Sussex moved to London again in the mid 1800's. The family were dominated it appears by Emma (Emily) Hawes and Fanny Fowler (see commentary)
Thanks to Jon's dad for a very detailed sketch of the Johnson's and Bigg's which got me started and Betty (Johnson) and Sid Matthews for filling in gaps uncompleted and Patricia Matthews and Suzanne Stanbridge for info on the Fords in Kent/Sussex