NEIL TENNANT and CHRIS LOWE gave a storming 90-minute set with an all-star cast at the Mermaid Theatre in London.

The legendary duo proved It’s A Sin to have been off the stage so long as they belted out their pop classics backed by the 60-piece BBC Concert Orchestra.

The lads also performed tunes from their forthcoming album Fundamental before Robbie took to the stage to sing Jealousy — the first song Neil and Chris penned together.

Pet Shop Boys
Crowd pleaser ... Robbie

Neil told me at the aftershow party: “I thought Robbie did a brilliant job. I loved the way he phrased the lyrics.”

Robbie was equally complimentary. Talking backstage at the Radio 2 concert, he told how honoured he felt and what a huge fan he was of the duo.

Pet Shop Boys
In full flow ... Neil

Fellow fan SIR ELTON JOHN turned up to soak up the atmosphere with the 600-strong audience, who were also treated to performances by Canadian singer RUFUS WAINWRIGHT and actress/singer FRANCES BARBER.

TREVOR HORN, behind FRANKIE GOES TO HOLLYWOOD hits like Relax, played bass. Hear the gig on Radio 2 on May 27 at 9pm.