When the land registry was digitised they got the land boundaries from the Ordnance Survey maps. The Ordnance Survey got them from tracing aerial photos. When p

When the land registry was digitised they got the land boundaries from the Ordnance Survey maps. The Ordnance Survey got them from tracing aerial photos. When property changes hands for the first time since the digital system was introduced the land boundaries from the OS mapping agency have to be checked against the original deeds as they are almost always slightly wrong, e.g my kitchen was shown as being partly in my neighbour’s garden according to the digital map.