Kai’s family are from Rosyth but currently live in Edinburgh and it was in the capital where the brave youngster underwent a 10-month course of intensive treatment at the Royal Hospital for Sick Children.

While he was allowed home to continue treatment at the end of this gruelling period, the family have received the heartbreaking news in the last few weeks that leukaemia has been detected in Kai’s bone marrow.

Despite various setbacks, including the toddler losing an eye from the chemotherapy, he is still soldiering on bravely.

Any future treatment that the wee West Fife warrior needs would mean another prolonged stay in hospital or a risky course of experimental medical procedures in England.

As if having a child with leukaemia wasn’t difficult enough, Kai’s family have other obstacles to overcome. Kai’s mum, Pamela Neilson, also has to care for Kai’s dad, Calvin, who has MS and this would make any future hospital stays very difficult for the family.

The people of Rosyth, however, have not let the family suffer alone and organised a race night at Rosyth Civil Service Club last Saturday as well as other fund-raising activities.

Kai’s grandad, Ronald Neilson, told the Press, “Five weeks ago, they detected that 50 per cent of his bone marrow was saturated with leukaemia again. They are doing tests on him and looking at alternative options. One of them would be a bone marrow transplant if he meets the criteria. Another would be an experimental programme they have in Sheffield.

“When they found that Kai had leukaemia he was given a four-week intensive course of chemo to try and get rid of it and get no detectable levels. If he has any detectable levels then he can’t get any bone marrow and it’s the same if he has any bugs. The chemo has already claimed his left eye and he’s got an artificial one in its place.” Kai and Pamela are currently having to go to the Sick Kids hospital regularly to get IV antibiotics to ensure that he is healthy enough to receive any prospective treatment. With a weakened immune system, Kai is vulnerable to infections and they could prove fatal. Last Christmas, Kai’s gran had a cold sore so Ronald and his wife were unable to visit the family over the festive period.

Ronald said, “Unfortunately, my wife has had three heart attacks since Kai was diagnosed. It has permanently damaged her heart and makes life very difficult and it’s hard to do things. Any backup for the family from my wife has evaporated.

“The fundraising is for transport, accommodation and maybe a wee holiday if he’s up to it. We are starting to create memories for him as well.

“The medical staff don’t want to give us false hopes as all the treatments can have the same effects as leukaemia. Getting a bone marrow transplant as a two-year-old is very difficult. The treatment can be harsher than it is for adults.

“He hasn’t got many options and he is in a lot worse of a case than when he was first diagnosed. He’s always happy and always has a wee smile and that’s how you know if something’s up – you don’t get a smile from him.

“He’s a fighter and umpteen people all around the country follow Kai’s story on Facebook. A caseworker at the hospital suggested a Facebook page after his first diagnosis. It means we only have to update people once, it’s coming from the family directly and it does away with rumours.

“My daughter periodically puts stories on the Facebook page and she does it as if it’s Kai talking and tries to make it more light-hearted. People have been very good.” Kai’s Facebook page can be found at https://www.facebook.com/kai.laidlaw?fref=ts