Bharti Airtel Chairman Sunil Mittal is looking to invest $1 billion into a hotel chain founded by his son-in-law Sharan Pasricha in London, as per reports. The money would reportedly fund acquisitions by Pasricha's Ennismore, a developer that owns the Hoxton hotel chain and Gleneagles resort. The injection would come from a Bharti Group company that handles Mittal's family wealth.