The girl behind the Brand/Ross row

As the row over Russell Brand and Jonathan Ross's lewd telephone calls to Fawlty Towers actor Andrew Sachs rumbles on - ­ they have had to apologise after leaving messages on his voicemail saying Brand had slept with his granddaughter - it was announced today that the regulatory body Ofcom is to investigate whether the Radio 2 prank breached the broadcasting code.

Complaints to the BBC have hit a record 4,500, the matter has been raised in Parliament and the respected former deputy director general Will Wyatt has entered the fray, saying Ross and Brand acted "like a couple of drunken teenagers in a phonebox trying to rag one of their chums".

Meanwhile, details about the young woman at the centre of the storm, Georgina Baillie, have emerged. The Times reports that Georgina, 23, is a member of the Satanic Sluts Extreme, a dance troupe who describe themselves as "four of the sexiest depraved London jezebels", who perform "violent, horrific and sexy burlesque shows". Baillie's stage name is 'Voluptua'.

This rather racy persona is abetted by the fact she has posted images of herself on social networking websites in provocative poses and describes herself as a "swinger", who dances in a cage at a nightclub.

And it transpires that last week was not the first time Georgina has been the subject of Brand's BBC Radio 2 show. David Baddiel, the comedian and author, who co-hosted Brand's programme for a week, recounted on air how he encountered Baillie at Brand's home.

"So I came round. You were in your pants, yellow Y-fronts. You opened the door in a sort of headmaster's cape, which was a bit weird. I said, 'They're still here, aren't they?' You said, 'They're still here.'

"So we went upstairs to your study, and the Satanic Sluts every so often would come up and say, 'Russell, have you finished?' And you would say, 'No, no, it's fine', meaning, 'Can you stay here because I shall be visiting you later?'

"The key moment for me was one of the Satanic Sluts said to me that her grandfather was Andrew Sachs... She said, 'Oh don't tell him I was here'. I thought, 'That's not going to happen, is it? I'm not going to ring up Manuel and say, 'Guess where I saw your grand-daughter?'"

The recent controversy began on October 18 when Ross and Brand, two of the BBC's highest paid stars, attempted to telephone Sachs for an arranged interview but were answered by his voicemail service. Brand told listeners: "What Andrew doesn't know is, I've slept with his granddaughter." As he left a message for the actor, Ross, 47, shouted: "He fucked your granddaughter."

Georgina, who cut short her European tour with the Satanic Sluts, appears to be relatively calm about the matter. She said: "I know something has happened, but I don't want to say anything more until I've had a chance to speak to my agent." Sensible girl. ·