England skipper Andrew Strauss and leading spinner Graeme Swann cannot attend the training session as they have been affected by a local variant of Delhi belly bug known as the Chennai chapatis. England is not panicking yet,but if both miss training today,their presence in the Group B match against West Indies will be increasingly unlikely. England will be desperate to have both,but the sort of stomach virus,which has affected several members of the touring party in the past three weeks usually,leaves the patient lighter and enfeebled for a few days,The Independent reports. Paul Collingwood would assume Strausss role as leader. England will spend the next day or so sweating over their fitness. It might be perspiration rather than food that has caused their illnesses. Jonathan Trott,Englands No 3 batsman,had a bout of the Chennai chapatis not long after arrival in the city from Chittagong. But he was able to practise yesterday and expects to be in full heart by tomorrow.