Minerva theatre, ChichesterJamie Bogyo's debut play recounts the renaming of a Yale University college with broadstroke humour and some exquisitely sung a cappella interludes What happens when public statues stop serving as historical markers of civic pride and become offensive to many in the present? Sometimes they are forcibly toppled, such as in the case of 17th-century slave trader, Edward Colston, whose bronze s…