Watch Mel Bloor's report
Grandparents Jenni and Nick from Wokingham have taken on a challenge to raise money for children's cancer charity CLIC Sargent in support of their granddaughter, Emily.
Emily was diagnosed with infant Acute Lymphoblastic Leukaemia last November at 5 weeks old.
She spent the following 6 months at Southampton General Hospital on intensive chemotherapy.
Now 16 months, Emily relapsed before Christmas and this week underwent a bone marrow transplant.
The couple, who are both in their 70s, are raising money for CLIC Sargent - a charity which has been supporting their family since Emily's diagnosis.
Jenni and Nick started walking in November with the goal of reaching 270 miles.
That later doubled to 540 miles, and now as they near 1000 miles they have decided to just keep going.
The couple said the walking is helping their mental health, and offers them hope that Emily will get better.
So far Jenni and Nick have raised more than £5000 for CLIC Sargent and have now set themselves a new goal of walking the virtual distance between each of the charity's Homes from Home.
They hope to complete the walk by Easter Sunday - an additional 480 miles.