MPs, local councillors and former Olympic champion Chris Boardman are among those who have signed an open letter to the Cycling Minister asking for a temporary halt to be placed on the proposed abandonment of Queensbury Tunnel.

Campaigners hope to restore the 1.4-mile long Victorian structure as part of an ambitious cycle network linking Bradford and Keighley to Halifax, but Highways England’s Historical Railway Estate (HRE), which manages the tunnel for the Department for Transport, is seeking to permanently close it at an estimated cost of £3.2 million.

Highways England says Queensbury Tunnel “represents the highest risk to public safety” of the 3,200 former railway structures it looks after.

The letter, sent to Jesse Norman MP by the Queensbury Tunnel Society, calls on the DfT to actively co-operate with Bradford Council, Calderdale Council and the Sustrans charity to ensure the greatest possible benefit is derived from the tunnel and any money invested in it.

Bradford West MP Naz Shah and Halifax MP Holly Lynch have added their voices to that of Bradford South MP Judith Cummins, who recently wrote to the Transport Secretary about the tunnel.

Former Conservative Party leader Iain Duncan Smith MP, who contested the Bradford West seat in 1987, has also signed the letter, alongside councillors Andrew Senior, Robert Hargreaves and Lynda Cromie from Bradford, and councillors Dot Foster, Daniel Sutherland, Barry Collins and Lisa Lambert from Calderdale.

Former Olympic individual pursuit gold medalist Chris Boardman MBE, now Greater Manchester’s first Cycling and Walking Commissioner, is also backing the call, together with Jeff McQuillan, who chairs the Great Northern Railway Trail Development Group.

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The letter proposes that some of Highways England’s £101 million budget to develop cycle links between city centres should be allocated to the proposed route.

In 2014, Sir Gary Verity helped to bring the Tour de France to the county in his role as Welcome to Yorkshire’s chief executive.

In a supporting letter, he says: “Building on the legacy of the Tour de France, there is an opportunity to create a landmark resource serving future generations – improving connectivity, helping to meet our health and environmental obligations, attracting tourists, hosting events, revitalising local communities and giving new life to a remarkable engineering feat.”

Norah McWilliam, leader of the Queensbury Tunnel Society, said: “We’re delighted that so many people in positions of influence responded so quickly to our call for support. It clearly demonstrates there is no appetite for large amounts of public money to be wasted on an abandonment scheme when taxpayers can get a return on their investment by repurposing the tunnel for future generations.

“It’s clear that the condition of Queensbury Tunnel presents no short-term threat to the people of Queensbury – contrary to the claims last week from Highways England – so those trying hard to secure a positive outcome should be allowed the time they need to undertake a full and thorough assessment of the cycle network proposal.”