I was briefly a Work Coach in a job centre for Universal Credit (UC) claimants age 25-49 in an urban area where there were pockets of high deprivation and which is a major asylum seeker processing/resettlement hub.
Hope this partial snapshot from a small area of the UK gives insight into this.
Someone with 2 years National Insurance contributions from employment could get new style Job Seekers Allowance for a 6 month period - they tended to move swiftly back into employment.
So someone claiming UC tends to (but not always) have little recent work experience and/or long term benefit dependency.
I can only speak for my particular postcode area as each will have different demographics but around 80-90 % of those I supported had multiple barriers into employment and/or complex needs and were not immediately work ready.
Up to a quarter of my caseload could not speak English with perhaps another quarter having some level of English.
I'd estimate that no more than 20% of my caseload were born in this country (by this, I mean that only a minority were fluent native English speakers).
A large minority could not read or write in any language (illiterate).
A large minority reported that they had no or little digital or PC skills or limited access to devices or broadband.
Up to 40% of my case load reported general health issues with around half or more of these reporting it impacts their ability to look for or take up work. This included those with substance abuse/addiction issues.
A very large percentage did not have any qualifications, skills, education or work experience.
I had some college and University graduates on my caseload. It's hard to estimate from a fluctuating caseload but it was a minority.
Many reported low confidence in being able to produce a CV, find vacancies or apply for jobs without significant support.
Some were lone parents with limited childcare support.
Some reported that they had informal caring responsibilities (supporting children and adults who do not receive health or disability benefits - i.e. they were not receiving Carers Allowance as those in receipt of CA have no requirement to seek work).
Some had criminal records, including the most serious types of convictions.
Some were homeless and in temporary or supported housing. This meant that as their housing benefit was so high, they could not take up employment until they were in settled housing - their rent is far higher than their income would be from working.
A few were from Care Experienced backgrounds.
It was not unusual for a female UC customer who had primary care of children (and their male partner) to request that the female in the partnership to be exempt from job seeking. UC, however, requires lone parents and women in couples with low household income to take up employment once their youngest child turns 3.
Many on my caseload expressed a preference to work part time when Universal Credit expects them to work at least 30 hours per week.
UC can be claimed indefinitely (in some countries benefits are time limited).