Competency-based app forms are the in thing in the public sector - the idea is if you can show that you are competent to do all the bits of the job, they avoid any possible discrimination on age or anything else. And if you can do the job, they don't care what you did before.
So you have to think of impressive examples in your career history where you displayed each of the competencies - I imagine 'dealing with difficult people' is one of the main ones for Jobcentres!
Most people working there know the system is crap and they can't do anything about it, so end up pretty demoralised. Went on a course for first-time managers a while back and one lass was about to be put in charge of a JobCentrePlus. With no management experience, 50 staff who were already threatening to go on strike. It was a 'developmental opportunity'...
I asked her a few months later how it was going. She said 'You know {name of minister known to be a total &*£$}? A job in his office came up so I leapt at that instead.'
Explains a lot about JobCentres - half the staff are people who were on benefits and were forced to take the jobs to avoid losing them...
If you can deal with the buraeucracy and saying 'i can't help you' to desperate people, the hours are flexible, conditions not bad, etc.