join the NHS bank? it's advertises as PT work but it seems that all bank workers are employed the hours they want, even more ('bank' in NHS terms has nothing to do with financial work, it's sort of like the NHS's own 'agency' where it can call on employees as and when required for staff sickness etc)
call 0151 482 7936 i've had about 3 texts today alone asking for admin staff. one for springview reception (mental health inpatient facility at clatterbridge) one for an admin assistant for the district nurses at Upton in Chester for 2 days a week, and one for a Med Sec in Birkenhead.
you would need to apply to be on the bank and go through a whole CRB/DBS process etc before being considered for the bank, but there's loads of work when you're on it.
all are at pay band's 2-4 (14-22K P/A)http://www.rcn.org.uk/__data/assets/pdf_file/0020/530228/004405.pdf