Dr Newson is on track to raise more than £1,000 for Molly Olly's Wishes, a charity supporting children with life-threatening conditions. She has previously raised £700 for the charity by organising a coffee morning.
Dr Newson told GP: 'I thought it would be a good way of raising money and improving my fitness. However, I didn't think about the logistics of training for such a long cycle ride over the winter months when it has been very cold, wet and dark a lot of the time!'
To donate, visit www.charitygiving.co.uk/louisemadmarchhare.