Mini-pupillages are important. You know this already. Every so often, something comes up, which is a mini-pupillage plus. This is one such opportunity. It is paid. It is working with great people. It will directly help you get pupillage. It is well worth doing.
FRU are advertising for an assistant legal officer. You want it. Go get it. But be quick – interviews are in about 2 weeks.
Good luck.