Sir Philip Green's Topshop retail empire is actually owned by his wife Tina, a 'blonde hurricane' who designs interiors for luxury yachts

Retail billionaire Sir Philip Green is at the centre of a row over the collapse of BHS, with MPs calling for him to be stripped of his knighthood, pay the collapsed retailer's pension deficit, and answer questions on the sale of the retailer last year for £1 to a twice bankrupt former racing car driver with no retail experience.

In shining a light on Sir Philip's business exploits, MPs and the press have also drawn attention to the unusual way in which his retail empire - which included Topshop, Wallis, Dorothy Perkins, and Ms. Selfridge - is structured.

While Sir Philip runs Arcadia, the group that controls all the brands, it is actually owned by Taveta Investments. Taveta is owned by Sir Philip's wife, Lady Tina Green, through a Jersey company that holds all the families shares.

Lady Green was initially summoned by MPs to appear alongside her husband at two Parliamentary Select Committee hearings on the collapse of BHS. But Sir Philip struck a deal with MPs to spare her the appearance and answer questions in her place.

Who is Tina Green and how involved is she in running the Topshop empire, estimated to be worth £3.2 billion?