It was Sue’s first time on a train with the dogs she organises activity holidays for, when disaster struck her own dog, Spartacus.

“I was helping the other dogs off the train at Ludlow and the next thing I knew Spartacus jumped down the gap. I was shouted over and just felt sick to my stomach.”

After an "unhelpful" guard told her the train hadto leave, Sue just couldn’t lift all 48kg of Spartacus by herself.

“I thought, 'I’m going to have to jump down with him, because they’re not going to run me over, are they?'”

Then, at the opportune moment, a heroic stranger performed a random act of kindness, lifting Spartacus out.

“I thanked him, but he was soon gone. I couldn’t tell you what age he was, or what he looked like.”

Sue wants to thank him properly.

“It renewed my faith in human nature," she says.