MHAIRI WAS working as a volunteer in a London charity shop when a middle-aged Irish woman came in. Mhairi noticed that she winced as she stooped to look at something on the shelf and asked her if she was in pain.

"I've got arthritis in my back," she explained.

When Mhairi told the woman that she was a Christian and asked if she could pray for Jesus to heal her back, the woman gladly agreed.

The following day the woman came back to the shop.

"Your prayer yesterday helped me so much," she said, "I came to ask you if you could please pray for me again today!"