If he is on Universal Credit they'd be trying to push him into work so they can meet quotas for getting people off benefits - IME they often don't really care what kind of qualifications or experience you have as long as they can tick the box. You can get other benefits if unable to work because of disability but it's very difficult to be approved for these - even people with severe disabilities or chronic health problems are classed as "fit to work" and have to appeal so I don't fancy Marcus' chances. I suspect some fiddling of the system has gone on