The postbox is emptied regularly by the town council and is near capacity on each collection day.
The letters, cards, poems and drawings are not read but are composted and returned to the earth in the spirit of the project.
Bullock added: “Whether used to express love, share memories, or simply maintain a sense of connection, the post box continues to be a valued feature for those navigating loss.
“The continued use of the box is a reminder of the importance of small gestures in supporting emotional wellbeing and remembrance.”
The Letters to Loved Ones concept was inspired by 10-year-old Matilda, who wanted to write to her grandparents after they died, so a white postbox was erected at Thorpe Road Cemetery in Melton Mowbray, Leicestershire.
A similar post box has been installed at Penmount Memorial Gardens in Truro, Cornwall as well.