The late will appear in a heartfelt documentary alongside sidekick , who has selected his favourite highlights from 25 years with his co-star to be screened on TV.
It has been revealed that the one-off BBC show, You'll Never Ride Alone, is due to be released before Christmas. It follows the poignant journey taken by 45,000 bikers from London to Dave's hometown of Barrow-on-Furness to pay tribute to his life.
That ride was Si's last as a Hairy Biker. He admitted he was too emotional to continue the show without his long-time pal. However, fans will be treated to a treasure chest of archive footage, more recent interviews, and some previously unseen material as a final farewell to Dave.
The star, who won over many hearts during his decades of TV adventures, will be sorely missed. The show is expected to be a fitting send-off to him after he tragically died of an unspecified type of cancer back in February, aged 66.
He'd bravely battled it for years and undergone at least 30 brutal rounds of chemotherapy as he put up his best fight against the deadly disease. Si has said of the documentary: "It was a very special show to pull together. Full of nostalgia, laughs and celebration of my best friend and his life."
Meanwhile, BBC commissioner Catherine Catton reminisced: "Dave and Si hold a very special place in the nation's heart, and this emotional film pays tribute to an extraordinary friendship."
Producer Andrew Mackenzie added: "The outpouring of love for The Hairy Bikers this year has been extraordinary and it was a real honour for everyone who has worked with them to document Dave Day and celebrate Si and Dave's friendship over the past two decades."
The news of the hour long documentary comes after Si made a sorrowful appearance on This Morning to share his memories of his friend.
Heartbreakingly, he revealed on the ITV show that he still finds himself expecting Dave to give him a call, before remembering the tragic reality that he is no longer here.
"Grief is a very individual journey because it's about an emotional adjustment of loss and the things that are no longer tangible, and that's the bit that's odd to get your head around," he agonised.
"The amount of times I've thought, 'I've not heard from that toerag for ages...' and then I go 'Oh man...'"
However, he assured fans: "Dave loved his life, he lived it to the full and he was joyous to be around."
Meanwhile, devastated Si was forced to complete the duo's book The Hairy Bikers: Our Family Favourites solo, after his biking brother's death meant he was no longer around to help finish it.
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