Robert Miller with the latest City and business news on a see-saw session for Europe’s markets, as Marks & Spencer is punished for missing forecasts; Barclays' shares suffer no pain as its investment banking arm posts a loss; BP shares bounce as one US investigator says there is no evidence to date that the oil giant compromised safety to cut costs in the Gulf of Mexico oil well blow out and sterling rises against the Euro on fears that Ireland's bank debts will bankrupt the country.