Published: 00:01, 11 June 2014 |
Updated: 10:40, 11 June 2014
But instead north Kent coroner Rebecca Cobb was forced to apologise to his family and legal representatives because an error meant there were not enough jurors.
Although there were seven, which is the legal minimum, one of them had not heard any of the previous hearing's evidence.
An eighth juror, who is now living in Birmingham, had not been required to attend and unavailable at short notice for the hearing.
Angry family members branded the error "disgusting" and said another delay would be "totally out of order". Legal representatives also said it was "extremely disappointing".
Callum's mother Karen Hodgson told Miss Cobb she was also concerned a further delay would mean witnesses would be unable to accurately recall what happened on the day.
They had already waited 18 months for the resumption of the hearing, which was adjourned for what was expected to be a short period for the coroner to prepare her summing up of the evidence to the jury.
Now a new inquest with a new jury on a future date will have to be organised and all the witnesses re-called and their evidence heard again.
Mr Osborne, of City Wall Avenue, Canterbury, had been working for Cooper Services Ltd on groundworks for new bungalows in Bridgefield Road, Swalecliffe, in April 2011 when the tragedy happened.
He was standing in a deep trench in which utility pipes were being laid when a section collapsed on him.
Rescuers fought with their bare hands to try and dig him out. But by the time he was freed he could not be revived by paramedics.
At the time of his death, he was living with his partner, Colette Scott - now Osborne - who gave birth to their baby daughter just a month later.
Afterwards, she said: "I'm really upset. Three years after Callum's death and we still do not have the answers and now we have to start the whole process all over again.
"I am now worried that not all the evidence will come out."
Stories you might have missed
Don't miss out, subscribe today. Keep up to date with our newsletters.
A guide for your future. For year 11 students in Kent and Medway. Click here for the e-edition.
Education, Training & Childcare is a special supplement published by KM Media Group four times a year. Click here for latest e-edition.
Get the latest food and drink news, recipes from some of the nation's top chefs plus updates from Kent's vineyards and breweries.
Search in your local area to find your perfect partner in Kent, with FreshStart Dating! PLUS, register for free!.
Find out what's going on in the garden, with Kent expert Lucy Hewett's weekly update.
Buy pictures that you've seen in a KM newspaper, or send in a picture and we will place it on our photo sales website so that you can purchase a super, unique gift.