A seedling from the iconic Sycamore Gap tree, felled in an act of vandalism last September, was planted by Dame Judi Dench and a competition-winning school girl at the Chelsea Flower Show.

The tree had stood along Hadrian's Wall for around 200 years before its demise triggered a massive public outcry in Northumberland and beyond.

The seedling is one of a collection propagated at the National Trust's Plant Conservation Centre in Devon, where it will return after the show.

Dame Judi was very concerned by the fall of the Sycamore Gap tree.

At the Chelsea Flower Show on Monday, she was joined by seven-year-old Charlotte Crowe, a pupil from Henshaw C.E Primary School near Hexham, the closest school to Sycamore Gap.

She won the chance to accompany Dame Judi after winning a competition organised by the National Trust which invited pupils to draw the tree and write a short poem expressing what it meant to them.

When asked about her win, Charlotte said: "I am so happy that scientists are trying to grow the tree back as it means a lot to our school.

"I was so surprised that I had won the competition and I'm excited to go to London because I have never been before."

Michael Glenton, executive head teacher at Henshaw C.E Primary School, said: "The children and staff of Henshaw Primary School are thrilled to be working with the National Trust to remember this iconic landmark and continue to celebrate its importance to our local community.

"The tree is the logo for our two federated schools (together with Greenhead Primary), and we will continue to ensure this important symbol of our community endures."

The National Trust, in collaboration with Northumberland National Park, Historic England, and the Hadrian's Wall Partnership, plans a range of activities to memorialise the loss of the tree.

Andrew Poad, the National Trust’s general manager for Hadrian's Wall, said: "The response to the tree’s felling has been extraordinary and demonstrates how the tree was special to many, many people, including Charlotte and Dame Judi."

The seedling is on display at the Chelsea Flower Show within the Octavia Hill Garden by Blue Diamond.

Hexham Courant: Charlotte Crowe joined Dame Judi after winning a competition at her school near HexhamCharlotte Crowe joined Dame Judi after winning a competition at her school near Hexham (Image: National Trust Images James Dobson)

Charlotte's winning poem:

I went to see Hadrian’s Wall and I saw a tree.
It was a mindful tree.
It was a mindful, famous tree.
It was a mindful, famous, historical tree.
It was a mindful, famous, historical, magnificent tree.
It was a mindful, famous, historical, magnificent, welcoming tree.
I really hope sycamore gap grows back.
When I go and see the tree it brings back lots of memories.