I still don't understand the point about these trucks driving illegally. What is it that they are doing that is illegal and what arrangements are they not following? They cannot be blamed for Sainsburys inaccurate forecasting of likely traffic. There are delivery trucks all over London and the UK regularly serving smaller shops than FH Sainsburys and in even narrower streets than Pearcefield Avenue. I doubt whether putting a banksman on to guide vehicles through is going to happen due to cost but I think there is a fair point about the compatibility of sharing tight spaces with large vehicles and this needs to be managed properly.
Surely the best thing is for local residents to ask for a meeting with Sainsburys to address the problem which they are experiencing and to try and seek a remedy or even install cctv cameras. These firms hate bad publicity of any kind- impacts on their shareholders. The Hob gets a lot of delivery vehicles into Devonshire Road too BTW.
I sympathise with vehicle damage as have had a lot of this myself but its generally from ordinary motorists not delivery trucks.
I worked with someone some years who witnessed the kind of horrific accident described earlier. The truck driver had no idea either that it had happened . As a result of her description I never again cycled in London.