Does the king need permission to enter London?
Does the king need permission to enter London? The reason is that the question itself is a well-known urban myth. The Sovereign DOES NOT have to ask permission to enter the City of London. This arises from a misunderstanding of an occasional formal ceremony.
Do royals pay taxes?
The King pays tax. In 1992, Queen Elizabeth II volunteered to pay income tax and capital gains tax, and since 1993 the Monarch's personal income has been taxable as for any other taxpayer. The King is subject to Value Added Tax and pays local rates on a voluntary basis.
What would happen to the Crown Estate if the monarchy was abolished?
Technically the crown estate is owned by the royal family. If the monarchy was abolished peacefully, they'd either get to keep their estate, or the state would buy it from them. If it was abolished by force, they'd get nothing, and would be lucky to keep their lives.