Hi
Part of my job is setting up care packages for clients like the ones being described and I deal with lots of different agencies so can offer a bit of advice.
There is a big difference between agencies both in terms of the way they treat their workers, training, pay, benefits , mileage etc and in terms of the care they expect the workers to deliver.
£6 per hour does seem low to me, around the area I work in the absolute minimum would be about £6.50 for a weekday, day time shift but some agencies pay considerably more than this and it is again much more at weekends or if you are prepared to work occasional nights or bank hols (when I say nights, meaning some clients might ask for 'night sits' where you stay overnight to offer support should they need it) for this type of thing you could end up with £25 per hour.
The best agencies I deal with tend to be the ones which are 'franchises' ie they are a company that is owned by an individual but under the umbrella of a bigger name, this way you get a lot more organisation and they tend to use their staff more effectively which means no massive gaps between clients, decent mileage etc, offer training in manual handling, infection control, bereavement, nvq in health care etc etc. the bigger firms often offer better rates for people who are willing to stick with them and get some experience and the take on more of a supervisory role etc. None of the companies I deal with would expect you to pay for pertol out of your own pocket between clients.
My advice would be to ring around a number of agencies, express your interest and ask questions about pay, training, mileage, some agencies also give you a contract where they guarantee you x number of hours and will still pay you if the hours aren't required, again these tend to be the bigger organisations.
Good luck, its a great job to do if you like helping people and don't mind the personal care side of things.