“I made 10 promises to my brother the Christmas before he died and one of those was to run the London Marathon and to raise £20,000 for Teenage Cancer Trust.”

I did the one thing that you don't ever want to have to do and Googled 'what do you buy somebody who is dying?'” recalls Andy Brown. His brother Rob was diagnosed with leukaemia in 2013 and died in January 2016. Andy says his brother wasn’t a particularly emotional person but was taken aback when he received the promises. “He knew he didn't have much time left. The actions meant more to him than any material thing would because material things don't matter if you're not going to be on earth for any longer. He was looking forward to the pain and the agony that I would endure by doing the marathon but also the fun and enjoyment that the family and everybody else would get out of undertaking the other 10 promises.

While Rob was ill he was always very positive. I truly believe that that was down to Teenage Cancer Trust.

I think if he'd been on a normal adult ward and had been sat with potentially 50-, 60-, 70-year-old people who were in the twilight of their life, I can't see that he would have been as positive. I believe if he hadn't had that unit he would have died much sooner than he did, and wouldn't have had the fight to carry on and to go through a bone marrow transplant.

There have been a few points where I've thought ‘why did I make this promise?’ but then what pulls me through was obviously the memory of my brother. It's really easy to motivate myself to just continue running and keep on going because Teenage Cancer Trust is such a good charity that helped him so much.

I had a point on my training runs where I knew there was a couple of hundred yards to go till I got home, and I envisaged the turn into The Mall and went for it, and pretended I was running down that Mall on race day. That just sent a real tingle down my spine and a sense of achievement, knowing that when I did that I'd be keeping that promise to Rob.

I was lucky enough to see the London Marathon once when Rob and I went to watch Hull City at Wembley. You literally couldn't move on the pavements because there were so many people out wanting to cheer whether they knew those people or not. That really made me quite emotional and was just really awe inspiring to see. To be running it now, it’s great to be able to have that legacy and have something to keep his memory alive as well.

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