Greenwich Comedy festival review - starry lineup relishes return of live banter

National Maritime MuseumSara Pascoe, Rich Hall and Aisling Bea warm to an excited crowd - and a divine heckler - in the chilly outdoors 'Comedy isn't essential?" asks Rich Hall, incredulously. "This isn't essential?" After the government announced financial aid only for workers in "viable" jobs, comedians - like all performing artists - are smarting at their exclusion. How can this not be viable, argued Hall, from an outdoor stage in the gardens of the National Maritime Museum. And from the crow...