I have to completely disagree with Amy. Job centre work experience isn't almost worthless as it's the only reason why I have a full-time job now. Whilst I was unemployed and claiming JSA I volunteered in two different charity shops and completed a Barista training course in which I gained certificates for Foundation level Barista, Health & Safety, Food Hygiene, First Aid and Fire Safety.
There are a lot of different work experience options available at the job centre, you just have to find one that you're interested in and stick at it until you find a paid job.