What about short term cnotract work? Not brilliantly paid but can work - leafletting, food samples, festival set up etc? There are a few agencies I know of. ID Staffing and Touchdown are the two that jump to mind. I'll think more as I think there are a few others. It's not 1 month work, more likely a few days here and there. Does that help at all?
How about coverstaff? It is a catering and waitering agency. He would be sent to do breakfast at Selfridges, serve at functions (embassies, private parties), hotels, etc. He can get quite a lot of work if he is keen!