Have you got any redundancy money/dosh to live on? How soon do you need to earn?
Can you get a basic part time job while you build up? B&Q or similar? Remember it's only to tide you over while you build your round.
If you've got a couple of grand spare then I would consider buying about £500/£750 (monthly) worth of steady/good work from a reliable source (get introduced to custies as part of the deal, pay half up front and the balance a month later if it seems good) to give you a "nucleus" to work from. (£500/750 will go a long way to covering your bills while things build up.)
(At some point, even if money is tight I would fairly quickly make a trolley or trailer wfp system for the tops and rooflights.)
Gets some cards on line from vistaprint - dead cheap.
Then canvass for five minutes round each job handing out cards just before you start cleaning/ include working Sat. am from 10 am til 12 and you will attract those that are at work who will see you.
Also canvass tea time til 7.30 on a couple of evenings a week.
Don't be too cheap to fill your books but not too expensive you put folk off.
If you get an odd job out the way then go and clean it at 4.30 then canvass around it after -
that way you pay for your fuel anyway.
Just my view, mind - there will be plenty of others ranging from rag it for a fiver a house to buy a £25,000 wfp system and round.
Edited to add: welcome to the forum Johnny B!
thats about it
i paid for most of my work from retiring WC'er ( and some1 returning to oz )
i then filled in all the gaps in the streets i had work, cards though the door on a regular time cycle ( it soon wears them down

)
vistaprint for the cards,. 250 for free ( well you pay postage ) after the first order you get sent a e.mail most days with other free deals on, ranging from free postcards ( ideal for flyers ) T-shirts, caps, lawn signs, pens the list goes on, i now order upto 10 free items and only pay 5 - 6 quid postage on them all, i have a fair few biz cards now, various designs aswell
http://www.vistaprint.co.uk/frfuk?frf=717267045889consider a few add ons, it seems around me the BIG thing at the mo is gutter cleans, 2 of them a day and you have made your money
pop over to the DIY site / forum for info on how to build your own system, e/mail me for a link, get yourself set up for well under 500 quid
diywfplink@yahoo.co.ukdont price too cheap, its easy to fall into that trap, as you will need the work at first, but i bet most have done it, think of what you want to earn per hour and aim for it
oh and dont believe the billy blaggers on here who say they earn 500 - 750 quid a day ( everyday a week )
Oh and you can build a nice little domestic round being the " honest joe " in his car with ladders on top OR a trolley system in the boot, you DO NOT need to go out and buy a 15 K van and pay a company 10 K to install a system, the domestic customer doesnt really care on what you drive or what system you use ( and what pole you use aswell ) people on here will have you think that you do need to spend that type of money, i am afraid to say you dont