The stadium has 26,459 seats. 27,000 is just a rounded figure that for some reason gets used. As for actual usable capacity for football, who knows. I suppose each match has it's own variables.
Don't mind the Swedes, it's all the bloody cabbages coming across the bridge that wind me up. Turning ashton gate into an allotment. Although fair play, they did try and fertilize themselves last time.