On Friday my wife was convinced she could already feel a difference in the back bedroom (which was notoriously chilly previously).
We've been told that it could take a few weeks for the full effect to become apparent due to the thickness of our walls - meaning that it takes time for the walls to heat up. Still the early signs are encouraging; it definitely feels as though the heat in the house is being retained longer once the central heating turns off.
Anyway I promised some pics of the front of the house as the insulation was applied so here they are:
Before:
And here you can see the fastening system.