HI YA SLIM.
Hackney is very good at the moment, as most window cleaners are poop scared of working around there. Its up to you weather you want to wok it though. You would be able to charge alot more then £7 per house there as there is a big demand for window cleaners in that area.
and Walthstow is a bit dry for work at the moment as i had a few lads knocking the area and they found out there is old boys have been working the area for at least 25 years.
Try and find them and offer them a price they cant refuse, there old boy,s and there thinking of there future what they have left off.
Where are of london do you live in?
OHH! by the way, i think you should use a vechile if doing hackney as its a bit safer with your gear and things. other areas you can just buy 4 part fold up ladders and take it on the tube with you.
Oh and also, if you can high level in the future try knocking chelsea area, you can make a mint or 2.
One bit of advice, use your common sense to get the customers, put your self in there shoes, (trust worthy) But if you work on the outer areas such like upminster and hornchurch areas there a bot more easyer open to srangers.
GOOD LUCK BUDDY! Hope this helps.
ANDY
(uk takeover)