Rory Pilgrim, Inventing Impressionism: this week’s new exhibitions

From Rory Pilgrim’s Platform residency in Sheffield to the National Gallery’s impressionism showcase in London, Skye Sherwin and Robert Clark find out what’s happening in art around the countryAs part of the gallery’s Platform residency programme of work-in-progress exhibitions, Rory Pilgrim is setting up an arena for the sharing of cultural memories and creative ideas between generations. Not one to dabble willingly in the shallows, Pilgrim intends to congregate a council of locally bas