That is what I would have thought also, however that wasn't the case, for some reason which I still don't really understand, it all appears to have gone to Mabel Speakman.
Extract from 2002 Appeal Judgement:
Then, as others have mentioned, the Pargeters later tried to make a claim for a portion that they believed was owed to them. They were either successful or they successfully came to an out of court settlement, I forget which now, but that is unimportant.
Actually this is easy to understand.
If there is no living spouse and no offspring then the parents of a deceased ar enext in line.
The Appeal Court was talking about at the time of the murders how Mabel Speakman was next in line BUT did not actually say she received the inheritance.
If she was still alive when the estate was settled then she would have inheritied but she was dead so instead it went to June's siste because if no parents are alive then siblings are next in line.
Since granny's will left the residuary to her Pam the result was actually the same anyway. Had granny's will left the residuary to someoen else tha tperson might have argued they deserved it instea doof pam and that even though granny died before the estate was settled that the assets should still have flowed into her estate and been given to her heirs listed in her will.
So in effect both paths led to the same door so to speak.