While the early summer festivals – from Sandbox in Egypt and Jazzablanca in Morocco, to Primavera in Spain and Bear Stone in Croatia – are done for the year, some of the season’s most distinctive music festivals still lie ahead. This month will see the return of major Arab gatherings, including Jerash Festival in Jordan and the International Festival of Carthage in Tunisia, while Mahrajan makes its debut in London as a showcase for regional stars and independent artists.