Joe - Can you point me to where in the article it says Mrs T held any shares in the property owning company ? All I can see is :-
Papers linked to her will state “the gross value of the estate in the United Kingdom amounts to £4,768,795”. But it does not appear to include the Belgravia mansion, valued at £12.4million by Zoopla.
The house was bought in 1991 by Bakeland Property Limited, an anonymous offshore trust in Jersey, on a 64-year lease. It was sub-leased to a firm of the same name based in the British Virgin Islands.
It is not known who the beneficiaries of Bakeland are. If Thatcher had owned shares in it when she died, inheritance tax would have been due on their value.