Sandringham Estate security work begins before Wills, Kate and Prince George arrive Topsoil has been removed from a field in front of Anmer Hall to make way for a new driveway Archaeologists have started a dig to make sure there's nothing of historic significance under the route before it is covered in tarmac Believed to be the start of numerous improvements planned for the property Mansion will be the couple's secondary residence after Kensington Palace Archeologists have moved onto the Sandringham Estate to examine land ahead of improvement works in the surest sign yet that it will soon be the country home of the Duke and Duchess of Cambridge. Anmer Hall, a Georgian mansion on the Sandringham Estate in Norfolk is undergoing a range of improvements which could make it fit for the Royal couple and their baby Prince George. Diggers have already scooped out topsoil from a field in front of the 10-bedroom house to carve out a new driveway which will provide the couple with greater privacy and security. The start of the work has raised speculation that Prince William, 31, and wife Kate are set to move in within a matter of months. Getting started: Work has begun on a new driveway leading to Anmer Hall on the Sandringham Estate in Norfolk leading to speculation the Duke and Duchess of Cambridge will move in to the property within months Plans: A church situated near Anmer Hall on the Sandringham Estate is having to change its entrance to allow the couple their own private entrance Final check: An archaeological dig on the grounds of the Sandringham Estate is checking that there is nothing of historical interest along the route of the new driveway before it is paved over with tarmac Archaeologists have started a dig to see if there is anything of historic significance under the driveway route before it is covered in tarmac, raising the possibility that work could be held up if anything important is found. It is not yet known what has been unearthed, although archaeologists have uncovered what appears to be part of an old stone wall. The Sandringham Estate commissioned a report by Norfolk County Council archaeologists to look into the land around Anmer Hall as part of a planning application for improvements. The report advised that a dig be carried out with at least three test pits dug prior to the driveway being completed. Work has also started on creating a new car park and path for St Mary's church next door to the hall as the existing church gate will become a private entrance for the Duke and Duchess. Part of the archaeological dig is looking at the area which will be covered by a new access route for vehicles going into the church car park. Anmer Hall is set to become William and Kate' second luxury home as the couple are about to move into their new London home - the 21-room Apartment 1A at Kensington Palace - which has been renovated at a cost to taxpayers of £1.1million. New home: Catherine, Duchess of Cambridge, and Prince William, Duke of Cambridge, pictured with their son Prince George, are expected to move into Anmer Hall in the next few months Delays: The work on Anmer Hall could be held up if archaeologists find anything of significance on the land Privacy: The re-routing of the driveway means the front gate to Anmer Hall will also be moved to keep members of the public away Fit for a future king: Anmer Hall is surrounded by farmland on the Queen's 20,000 acre Sandringham Estate But all the work to Anmer Hall will be paid for by the Royal family as it is privately owned by the Queen. The hall which includes a tennis court and swimming pool is around two miles from Sandringham House. It is surrounded by farmland on the Queen's 20,000 acre estate, meaning that Kate and William will have a high level of privacy to bring up baby George. The Queen is believed to have asked the current tenant of Anmer Hall to vacate the property as soon as possible even though he has four years left on his lease. Businessman James Everett has rented the hall from the Queen for the last 13 years and has been running his bespoke timber company, Norfolk Oak, from its stables. His company's blog confirmed in July that the hall would soon be 'faced with Royalty once more'. Norfolk Oak is in the process of moving its workshops and offices to new premises at the former RAF West Raynham base in Norfolk. All changing: Work has also begun on a new car park and path for St Mary's Church, situated next to Anmer Hall, as its current church gate will become a private entrance for the royal couple Expansion: As well as a new driveway, planning permission has been given for a string of improvements, including a 16ft by 16ft garden room Mr Everett and his family are apparently still living at the hall and are understood to be moving soon, but he has not responding to requests for comment. King's Lynn and West Norfolk Borough Council gave planning permission in March for improvements to Anmer Hall including a new 16ft by 16ft garden room built on to the kitchen. A pergola made from stone columns with oak beams for plants to trail through will provide shade on a patio area and a front lawn will be converted into a car park. A garage block and wood store will also be converted into storage areas and accommodation which could be used by police guards. The plans have been drawn up by architect Charles Morris, who was behind a controversial extension for Prince Charles at his own country home Highgrove House. The re-routing of the driveway will mean that the front gate to the house will be moved so members of the public will be kept away. It is understood that dozens of extra armed officers are being recruited to help provide security at Anmer Hall. Norfolk Police confirmed in July that the force was looking for extra firearms officer to 'address a current shortfall in numbers'. A spokesman said at the time that the officers were needed 'for normal policing duties and to support our on-going commitment to the Royal Estate at Sandringham in the west of the county.' Home sweet home: Kensington Palace, where the royal couple have given their apartment a £1million makeover, pictured shrouded in scaffolding and coverings Facade: The fake frontage of Kensington Palace was erected while work was being carried out. The enormous canvas - measuring about 25,000 sq ft - covers the south side of the building