The property was in my Aunts name only on the deeds.
My initial request should have read that "I do not know their individual tax status" as I think one is self employed and another does not pay tax.
As it was spread over the 2 tax years can I claim two tax allowances and why would I have to pay at 28% as the executor?
I am retired and only pay tax a the basic rate
You cannot spread the gain over two tax years or claim two allowances I'm afraid. Executors pay CGT on behalf of the deceased estate at 28%. See page 5 here for confirmation of the rate for 2013/14. It is the same for 2014/15 as you can read here.
The CGT is not a personal tax liability of yours so your income and tax rate are not relevant. As I said above, deceased estates pay CGT at 28%. The CGT should be paid from the cash you hold from the sale of the property.
Can I claim for any maintenance of the property over the last16months and improvements made to increase the value of the property and gaining planning consent to also increase the resale value?