Andrew Mountbatten-Windsor arrested | Sky Video News |

Vehicles reported to be unmarked police cars were seen this morning at Sandringham in Norfolk, where Andrew Mountbatten-Windsor has been living since leaving Windsor.

How long can police hold Andrew for?

Our colleagues at BBC Radio 5 Live have been speaking to Danny Shaw, a policing commentator, about what Andrew Mountbatten-Windsor's arrest actually involves.

Shaw says the absolute longest the former prince can be held for is 96 hours - but this would require multiple extensions from senior police officers and a Magistrate's Court.

In most cases suspects are held for 12 or 24 hours and are then either charged or released pending further investigation, Shaw says.

Andrew will be placed in "a cell in a custody suite" with just "a bed and a toilet", where he will wait until his police interview. Shaw says "there'll be no special treatment for him".