The bathroom belonged to a live-in governess, Mr Virag said, who he was holding a meeting with in a basement room of the five storey property when the theft occurred.
“She would have been in that room and there would have been a confrontation, which is quite scary,” he said.
Mr Virag said the intruder would have had to climb down onto a sink from the window, but moved “like a cat” to avoid making any marks on it or disturbing the cosmetic products it was littered with. Around £300 in cash on a desk in the room was left untouched.
The family spokesman said he heard a banging during that meeting but put it down to the strong winds outside.
“Retrospectively, I can put two and two together, which at the time you don’t really think,” he said.
Mr Virag said he believes the noise could have been a staff entrance door banging in the draft created when the intruder opened the window, and that the thief closed the window quickly to avoid being given away.
The intruder was then captured on CCTV cameras moving around the house above them, struggling to open cases containing expensive jewellery before putting items into his bag.
Time stamps on one CCTV image released by the family indicate he narrowly avoided bumping into the maid when they walked through the same hallway seconds apart.
