My favourite route from London:  Take 19 South towards Tillsonburg.
Take a left turn in Mount Elgin onto Mount Elgin/Norwich Road:
Emacs!
 

Carry on through Norwich and Oakland toward Scotland.
Emacs!

Do a left then a right in Scotland. (the left is at a T in the road and a stop sign.  The right is another stop sign.
This should put you on the road to Brantford and you will cross HWY24 at the lights
and continue on until Regional Road 20 to Hagersville.

Emacs!
RR20 is at Cockshutt Rd and Oakland road.  You turn right onto 20.

Stay on 20 through Hagersville and across HWY 3.  Keep going to Kohler Road (Haldimand  8)

Emacs!

Emacs!

Turn right onto Kohler and stay on it until you come to the big yellow building and the stop sign.
Turn left onto Rainham Road and travel six km to the house.  5684 Rainham Road.