Despite not being able to run even one mile at the beginning of the year, the determination of the former breast cancer sufferer to raise money for Breast Cancer Care has, we learn, driven her through 11 months of gruelling training.
'I wanted to do something that got me on my feet again and helped me get control of my life. When you're ill you feel at the mercy of everyone else,' she tells us, audibly limbering up for the challenge.
Grant wants to raise £10,000 - and has £8,000 in the bag already. She is also aiming to complete the run within five hours - and plans to cram in plenty of shopping and celebratory cocktails afterwards.
For more information go to www.cgny05.org.uk.