firstgroup plc said wednesday that it is buying ensign bus company ltd for an undisclosed sum the ftse 250 trainandbus operator said it expects to close the deal within the next few months if the acquisition completes before the companys year end in march then the board expects the companys adjusted net cash position to be between 70 million pounds and gbp80 million 843 million and 964 million reflecting the buyback program the timing of net capital expenditure and working capital flows this is a strategically and financially accretive growth opportunity for us and one that is fully aligned to our balanced capital allocation policy chief executive graham sutherland said