A metre-long piece of carved wood discovered by chance is more than 6,000 years old – making it the oldest carved wood in Britain, experts say.

The decorative markings were made by Late Mesolithic people 2,000 years before Stonehenge was built and 4,500 years before the Romans came to Britain.

The piece of oak was discovered lying in peat during the construction of an outbuilding at a property in the village of Boxford in Berkshire.

Experts suggest the carving pre-dates by 500 years the only other known Mesolithic carved timber in Britain, discovered near Maerdy in Wales.

It’s remarkable that by doing routine building work a piece of modest-looking decorative wood turns out to be the oldest ever found in Britain

Historic England has dated the specimen to the Late Mesolithic period (4640-4605 BC).

The purpose of the markings on the wood is not known but they look similar to the decoration seen on early Neolithic pottery, experts suggest.

Duncan Wilson, chief executive of Historic England said: “It’s remarkable that by doing routine building work a piece of modest-looking decorative wood turns out to be the oldest ever found in Britain.

“This exciting find has helped to shine new light on our distant past and we’re grateful to the landowner for recognising its significance.

“Amazing discoveries like these remind us of the power of archaeology to uncover the hidden narratives that connect us to our roots.”

The waterlogged carved oak is one metre long, 0.42 metres wide and 0.2 metres thick.

It was discovered during ground works for the building of a workshop, and was found approximately 1.5 metres below the surface not far from the present course of the River Lambourn in a layer of peat.

Peat is able to preserve organic materials like wood over thousands of years because the normal processes of decay are slowed right down due to a lack of oxygen within the peat.

The timber was removed and later that day it was cleaned and found to have some markings that did not appear to be natural.

The markings on the wood are also believed to be similar to the body decoration on the Shigir Idol – a wooden sculpture found in the Ural mountains of Russia which, at 12,500 years old, is believed to be the oldest example of carved wood in the world.

The landowner, Derek Fawcett, a retired urological surgeon, said: “It was a rather surprising find at the bottom of a trench dug for foundations for a new building.

“It was clearly very old and appeared well preserved in peat. After hosing it down, we saw that it had markings that appeared unnatural and possibly man-made.

“I have been working with Historic England and the Boxford History Project since I found it, now over four years ago, while radiocarbon dating of the wood was carried out.”

After being notified of the find in 2019, West Berkshire Council’s archaeologist Sarah Orr contacted Historic England for expert advice.

To coincide with museums week (June 5-11) Derek Fawcett has donated the timber to the West Berkshire Museum in Newbury where it will eventually go on display.

The museum is also working with the Boxford History Project to arrange for the timber to go on loan to the Boxford village heritage centre.