2meters=> 2m/(40000000(m around earth)*cos(51.5))*86400(sec/day)= .007 sec off, not 8 min off. And .007 sec cannot be read on the dial of a sundial. Even Oxford is only 5 min off (see the definition of time at Christ Church College which still goes by sun time, and which differs by 5 min from everyone else's time). And the analemma means that the time is off by up to 15 min per day at different parts of the year anyway. While I would certainly have been upset had I been the dial maker, it would not because that 2 meters makes any difference to the accuracy of the sundial. (And since noon is determined by the 0 latitude, which has shifted, it is actually off by 104.5m,or .3 sec, not 2 m ).