oo-er HI Thugu - you well ?
Tried to do this earlier on but it got wiped
Barmaid will be along later
Q1 - the leading case is here
http://swarb.co.uk/commissioner-of-stamp-duties-queensland-v-livingston-pc-7-oct-1964/
Australian tax case that applies in the UK - the property after the death of a testator resides in the executor - but then after disposal he may have other duties administering the resulting trusts that arise from the will. - so in short yes he can as he really is representing the interests of the now dead testator.
Q2 they will have done ( agreed ) under the original will - and it is also allowed by the Trustee Act 2013. - dont have a solicitor as an exec ! You have read this before.
Q3 inventories and receipts - and yes fertile grounds for pointless quarrelling - s/o who is becoming demented insisting that shiny gew gaws in the house are hers because she "remembers" buying them 35 y ago. O mi god. clearly I am speaking from experience
Q4 - well short answer no - long answer yes MW has the power to stop MF wasting the estate - that comes from a 1800s case where a widow was prevented ( made to replant I think) a wood that she had cut down - enforced by the eventual heir ( = remainderman ) . So he [your fella] cant 'walk in' but he does have rights against wasting
Barmaid will come in with a whip soon
and call use to order
( I love it when she does that )
The situation I think you have is
a silly old dement spending the heirs money on stupid legal points.
Hopefully nature will run its course.