This is a lovely concept and I wish they’d continue it around the park to be honest. The gist is that everyday people that did something heroic to save a others life but died as a result get a plaque in their honour at this park. It’s such a lovely concept and looks lovely.
This lovely little park, just north of St Paul's, close to the Museum of London, contains dedications to police officers who lost their lives in WW1 and Watts's Memorial to Heroic Self Sacrifice. It is a lovely area to sit and relax, to enjoy you lunch, or to catch some sun on the grass.
It is also worth noting that there is a free mobile app 'The Everyday Heroes of Postman’s Park' which details each of the fifty-four incidents recorded on the Memorial and reveals the lives of the sixty-two people commemorated.
This is an adorable, restful park that's often bypassed. The highlight is the Monument to Heroic Self-Sacrifice, a series of plaques commemorating people who died while attempting to protect others. It will make you feel like an underachiever.