British Airways flew into more trouble this morning after investment bank Goldman Sachs downgraded the stock from a "buy" to a "sell" saying lower revenue and oil prices would cut profits by up to 46 per cent.

British Airways is already reeling from the chaos in the opening days of its £4.3 billion Terminal 5 headquarters, which prompted a public apology from BA chief executive Willie Walsh.


The fiasco has resulted in 399 flights being cancelled up to and including Wednesday, with an estimated cost to the airline of £20 million so far.

Shares in the airline fell nearly 4 per cent to 230.75p in morning trading.