M&S, Snapchat, British Airways: Everything that matters this morning

M&S replace food boss with exec from Steinhoff
Marks and Spencer (M&S) is replacing the company’s food boss Andy Adcock with Stuart Machin, the current CEO of South African retailer Steinhoff.
M&S says the move is part of a wider transformation plan and an overhaul of its food arm.
The move comes after the retail giant reported four straight quarters of like-for-like sales decline – the latest during the Christmas quarter.
Machin, who has worked across the sector for 30 y