Hi Wiz, it's nice to know that you can contribute more than seanc when I have gone out of my way to try and help him.
Go to jobcentreplus.gov.uk, click on 'Looking for a Job', then 'Search for a Job'. In column 1 highlight 'General', in column 2 click on 'Cleaning/Hygiene' and in column 3 highlight 'Domestic cleaner/Valeter'. I know this may not seem to cover Office Cleaners but you know how Government organisations are...
Then scroll down to the bottom of the page and click on 'Continue'.
Type in the Post-code of the place you are recruiting/quoting for and in the 'distance' box highlight 5 miles.
Then click on the 'Search for Jobs' link.
It will drop down a list of all vacancies starting with the ones closest to the Post-code you entered.
For example, in Horsham, West Sussex the rates appear to be around the £5.50 - £6.50 per hour mark which confirms what you say.
I regularly use this and sometimes find vacancies for the site that I am quoting for which in turn gives me great ammunition.
I hope this helps.