Boris Johnson is officially moving into Downing Street on Monday and will be joined by his partner Carrie Symonds.

Their move into the larger four bedroom flat in Number 11 occupied by prime ministers since Tony Blair will cost the taxpayer nothing, a Downing Street spokesperson said.

They refused to comment on whether Johnson’s children from previous relationships would receive any taxpayer-funded protection and said they were “not aware of any plans” for any of them to move into Downing Street.

The spokesperson was unable to say whether Symonds, 31, would accompany 55 year-old Johnson on the PM’s annual trip to Balmoral in Scotland to visit the Queen.

“The PM is officially moving in today and yes his partner will be living there,” the spokesperson told Westminster reporters.

“In relation to her living at (Downing Street) there won’t be any additional cost to the taxpayer.”

During the Tory leadership campaign, Johnson refused to answer questions about a loud row he had with Symonds, south London, which prompted neighbours to call the police to her London .

The Guardian newspaper said it had heard a recording of the incident in which Johnson could allegedly be heard saying “get off my f****** laptop” before a loud crashing noise.

At one point Symonds was heard telling Johnson to “get off me” and “get out of my flat”, the newspaper reported, while other neighbours said they heard screaming and banging coming from the property.

Johnson refused to discuss the row when asked about it in the leadership campaign, saying he has a rule not to involve his loved ones in his public life.

Symonds, the Tories’ former director of communications, stood with Number 10 staff as Johnson made his first speech to the nation as PM from Downing Street last week.