Two brothers from Blackburn Mohsin Issa, 48, and Zuber Issa, 47, have been revealed as the buyers of London mansion that will be 25 times the size of the average British home when finished.

Rags-to-riches which began when their immigrant parents father Vali and mother Zubeda came to Lancashire in the 1960s. Their father started working in a woollen mill and were living at a two-up, two-down terraced house on Balaclava Street in Blackburn when Mohsin and Zuber were born in the early 1970s. The house which even today is worth just £115,000.

Brothers opened their first forecourt in Bury in 2001 and have since transformed their company EG Group into a global behemoth with 4,700 sites in the US and Europe.

The firm is now exploring a

stock market float which could see it valued at £10bn – and between them the brothers own half the business, putting them in line to control a £5bn stake.

They bought a £25million Knightsbridge mansion in November 2017, – although they are unlikely to move in any time soon. The house was once owned by conman Achilleas Kallakis, who put in a controversial planning application for an “iceberg basement” in 2005. Work stopped in 2008 when he ran out of cash.

Brothers working to create a so-called iceberg basement descending three storeys to include a garage with a vehicle lift, a swimming pool, gym, music room, cinema plus three additional bedrooms.

They house has grand reception rooms and a formal dining room giving access to the restored garden, one of the largest in the area. A huge master bedroom suite will take up the whole of the second floor and the top two storeys will have five further bedrooms.

The whole property could be worth £80million when work is finished.