Quoted from Sako-TRG:I believe the Queen will remain at Balmoral Castle until Sunday.
She will then be taken down the Edinburgh Royal Mile to Holyrood Palace.
Then she will be flown down to London to Westminster to lie in State for public to visit and pay their respects prior to funeral in 10 days.
I would have expected a slow train conveyance to London so people can show respect along the way. Seems like something people would appreciate and remember.