Managed to find a wonderful child minder... she is awesome. Left dd with her yesterday for 3 hours, dd due to do a full day friday and I start work Monday.
Work only finally confirmed my hours after chasing and chasing them yesterday. They then called at 5pm last night having changed them again and have requested overtime and shift changes in my first 3 weeks back.
Result is I can't afford to go back to work. I am going to have to resign today and work out what notice I owe them if any. I am devastated. But the only way we can manage financially is if I try to build up my work portfolio I do at home in the evenings / night and leave my day job.
Legally what do I have to pay her? And will she hate me for ever more?? 
Please tell me that this does occasionally happen.