Simplify the following text for a Grade 8 native English-speaking person.
Original: The orchestra is the principal orchestra of The Proms , the annual season of concerts played at the Royal Albert Hall , giving around a dozen concerts each season , including the First and Last Nights , the most concerts of any single orchestra during The Proms .
Simplified: The orchestra plays a big part in the BBC Proms , the season of concerts played every summer at the Royal Albert Hall .