LONDON (Reuters) - Prime Minister Theresa May will chair a meeting of Britain s emergency response committee later on Friday after an incident at a west London tube station, her office said in a statement.  My thoughts are with those injured at Parsons Green and the emergency services who, once again, are responding swiftly and bravely to a suspected terrorist incident,  May said in the statement.  The meeting of COBR, the emergency response committee, will take place at 1200 GMT. 