A woman's faith in humanity has been restored after a complete stranger helped her out when she was feeling unwell on public transport - and she has now thanked the person in a heartfelt letter.
The woman was travelling on the London Underground when she suddenly felt unwell and started to vomit, a situation most people would hate to be in.
The London Tube is a place where strangers notoriously avoid eye contact, and certainly don't usually talk to each other.
