THE National Trust is inviting visitors to discover more about what lies at the core of the Wellington Monument this weekend.

They will have a rare opportunity to view conservation work when contractors drill samples from the core of the Monument on Saturday.

National Trust building surveyor Ken Evans will also be on hand to discuss the Wellington Monument project and to answer questions.

The works, which were set to start on Monday, are expected to last seven days and also include drilling samples from the foundations. That will allow the National Trust to better understand the extent of holes within the structure that can act as channels for water to run down and the use of different materials throughout.

Mr Evans said: “Taking and analysing these samples is the really important final part of the survey work that we’ve been undertaking over the past 18 months. Following the work to date, we estimate that a full repair to conserve the Monument would cost £4 million, but this figure is subject to findings from the samples. If more problems are revealed this could considerably raise the costs and put the project at risk.”

Most of the £4m project costs need to be raised from external sources and a large application is planned to be submitted to the Heritage Lottery Fund this December. If this can be secured, a campaign will be launched locally to raise the additional funds required.

Project manager Helen Sharp said: “The Monument is extremely important as the tallest three-sided obelisk in the world and it is this significance in addition to the affection that local people hold for it that is driving us to work hard with the community to raise the funding needed.

“If we can raise the money it would safeguard the Monument for the next 60 years and enable people to climb to the top again – which would be just amazing. We’d also like more people to be able to enjoy the site generally and would share more of its history in addition to organising a series of activities and events with the community and making it more accessible to everyone – including people with disabilities.”

The Monument was built to commemorate the Duke of Wellington’s victory after the Battle of Waterloo in 1815. The foundation stone was laid in 1817 but the work was dogged by problems and lack of funding – it was finally completed in its current form in the 1890s.

More information on the Trust’s progress with its project to repair the Wellington Monument can be found at www.nationaltrust.org.uk/wellington-monument