The increasing volume of a samba band from a side street. Approaching a zebra crossing. A policeman and policewoman assisting two bands and a parade of costumed schoolchildren across the road, en route to their park rendezvous. The ‘modern Met’. The days of assisting the proverbial ‘little old lady’ over the road long gone, now replaced by the fresh challenge of aiding a (curriculum endorsed) multicultural/pan-south American musical extravaganza.