Puzzled....

Looking over my stats, I have noticed something very strange. At first glance, the number of hits appears to be fairly constant but on looking deeper I find that over the last few days the bulk of hits appears to come from only one isp, somewhere in Essex. Not only that but there are many page hits from this source. So, my question is this, is it only one person reading me again and again or is it that somehow many others are routed through this isp? I just don't know. But I am curious.