By Jess Jones Billionaire restaurateur Richard Caring has reportedly launched an auction starting at £1bn for his share in The Ivy and its sister restaurants. HSBC has started distributing marketing materials to potential buyers of the popular restaurant as well as the Ivy Collection and Ivy Asia sites, according to The Times. Caring, also known as the ‘King of Mayfair’, co-owns the Ivy group in a 50/50 partnership with former Qatari Prime Minister Sheikh Hamad Bin-Jassim Bin-Jaber Al Thani. It is understood that the British businessman, who owns The Ivy Collection via his restaurant business …