Anything temp, seasonal or under 16 hours/week is going to mean at the least debt and at the worst rent arrears/baillifs for most currently on JSA.
Because, depending on the council, the benefits are completely stopped from the first day of work, even if the pay doesn't come until a month later, meaning the HB and CTB stops, too, but the months' rent and council tax are automatically due.
The working person then has to re-apply for these and wait until these are processed, which, again, depending on the council, could be months.
Tax credits also terminate and you have to re-apply.
Then, when your temp contract ends, you have to re-apply for everything all over again.
If you are fortunate enough to be a council/HA tenant, there might be some leeway (of course, you'll likely also have to take out loans for essentials like food, electriciy and transport until you get paid).
But if you are in privately rented housing, unless you have magically managed to save about a thousand if not more, you will be looking at eviction.
You may also be looking at bailiffs and council demands for the full fiscal year's council tax.