Error on Land Registry Title Plan

We are in the process of buying a bungalow approximately,  200 meters away from where we currently live.  On the Land Registry plan for the bungalow,  the boundaries look correct  but the footprint of the bungalow is incorrect.  It shows a square building when in fact the bungalow is 'L' shaped.  We know that in 2001 an existing bungalow was demolished and the new 'L' shaped  one built.  I have visited the Local Authority planning portal and confirmed that planning permission was granted to demolish and build.
As we currently live so close to the bungalow 'our' title deeds also also show the bungalow and on 'our' title plan the bungalow is 'L' shaped.
Is seems odd that on one Land Registry title plan the bungalow is 'L' shaped but on another, the Land Registry title plan for the bungalow,  it is square.
Is think something I should be worried about?

Susan - far from unusual and nothing to be concerned by. 
We don;t register the shape/size of a building. We register 'land' so the general boundaries by mapping the title on a plan with a red outline. So what's within that red line is part of the title irrespective of what shape it may have been or now is.
Titles are registered using the Ordnance Survey detail available at that time. As such two adjoining titles might be mapped at very different times and many years apart. OS don;t survey and remap areas all that often but when they do they would pick up new features inc new shapes to buildings and map them accordingly. 
So if the bungalow was mapped by OS in 1970 and registered by us in say 1995 your own property may have been mapped by OS in 1980 and registered in 2000 and the two base maps would show different features. But as we are a land registry it maters not as the land itself has not altered.
That's why when you are buying a property the conveyancer will often ask you to take a look at the title plan and compare it with the reality on the ground re the actual boundaries/extent. Is what they are selling within that red outline/actual boundaries? If the answer is yes the size and shape of the building matters not from a purely registration perspective