Not sure how accurate entitledto.com is but if I take the job at the hosp I wil actually have £440 to live on inc all benefits etc and £333 to pay out.
If I work at the school on half the pay for term time I wil have £475 to live on with £333 to pay ot 
And not working I have £289 to live on with £160 to pay out.
All income inc child benefit, tax credits etc..
Doesn't make any bloody sense to me.