Another notable street tree for National Tree Week is the Chelsea Rd Elm, a 130-year old Huntingdon Elm.
The Chelsea Rd Elm is home to the very rare White Letter Hairstreak butterfly, which only lays its eggs on elms.

The Chelsea Rd Elm was originally put on the felling list in 2015 supposedly because it was ‘decayed & dangerous and damaging the pavement & road’. This was hotly disputed and the tree was saved after a four-year campaign highlighting its importance, including a street party, achieving 2nd place in the Woodland Trust English Tree of the Year competition, intervention by Sheffield & Rotherham Wildlife Trust and Butterfly Conservation, and a visit by an open-topped bus giving a closeup view of the canopy & butterflies. Around 40 protestors braved the freezing cold and blocked its felling in February 2018.

Simple pavement and road repairs were eventually completed in 2020, removing it from the felling list, and sensitive pruning was carried out.

Huntingdon elms are fairly resistant to Dutch Elm Disease, but since being saved the Chelsea Rd Elm has continued to be attacked by the beetle that causes the Disease and is now looking poorly. In the time since the tree was saved, Nether Edge & Sharrow Sustainable Transformation has amazingly been able to plant 101 Disease-resistant elms near the Chelsea Rd Elm, which should provide a viable alternative home for the White Letter Hairstreak butterfly if the Chelsea Rd Elm does succumb to the Disease.