Never showed any passport on any bus. If so, then the police report would suffice as show, as it states he lost his passport.
Regarding money, he must have 1 friend that can help him. Somebody in UK can send by WU to that man, give him the code and they go together to take out. Otherwise I am pretty sure the tourist police can do the same for him.
He just have to be inventive, instead of sitting feeling sorry for himself. On the other hand, that´s not British.