A Kent girl is urging drivers to be more cautious and respectful of horse riders on the roads.
Moments later, Mr Boom and another man approached and questioned their presence in the park.Larman then pulled out a large hunting knife from his waistband and when Mr Boom told him to put it down, Larman lunged at him, stabbing him twice.
Emergency services were called, but Mr Boom died at the scene.During their trial, both defendants claimed Mr Boom had been the aggressor and had been armed with a knife.These allegations were rejected by the jury.
Both were sentenced at Northampton Crown Court on Monday.Mr Boom's family described their ongoing grief and the loss felt by his young daughter and niece in impact statements read to the court.
His father Kevin Boom added: "All the pride and joy his life had given me has gone. It has been replaced with rage, anger and hatred for the way his life ended."
His mother Joanne said: "My head knows that he's gone, but my heart will not accept it. Instead, I lay flowers where Tommy is laid to rest.""I didn't go to bed - I was just staring at the TV," he adds. "I just didn't know what to do."
The final death toll was later revealed to be 56. Fifty-four were Bradford supporters, while the other two were Lincoln fans Bill Stacey and Jim West. A stand at Lincoln's Sincil Bank ground is named after them as a lasting tribute.Helm recalls interviewing supporters later, including one man who was able to escape by clambering over the wall and onto the pitch, but who could only watch as his elderly father was fatally trapped, unable to make the climb himself.
"Those are the sort of chilling stories... it's sending a shiver up my spine now to be honest just talking about it," the commentator says, adding that he has never been able to look back at the footage of the day."It's still extremely raw, even 40 years on."