Music
Michael Eavis / Rex Features
Cliff, who played the Pyramid Stage in 2003, has said on his website that he will play the festival on Friday, June 27.
Soul stars Armatrading and Burke have also admitted they will be playing the annual summer bash, according to eFestivals.
Another act rumoured to be playing the event is veteran singer Leonard Cohen, who hasn't performed live for 15 years.
On Monday the Canadian released details of a US tour and The Times has reported that Cohen may headline the Pyramid Stage on Sunday.
> Who should play this year's Glastonbury? Click here to read our suggestions and make your own
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