They want to increase their resources and ensure people with serious or terminal illness, and those close to them, can access hospice services into the future.
In 2018, the closure of Michael Sobell Inpatient Unit alarmed people.
Harlington Hospice, based near Heathrow for almost 38 years, and the Michael Sobell Hospice Charity joined together to allow the unit to reopen in January 2020.
Throughout the pandemic, the charities expanded their services and it became clear further collaboration could benefit people.
Now, after four years, their separate clinical and fund-raising teams will combine.
Steve Curry, Chief Executive at Harlington Hospice, said: “I see this as a launch pad into the future of hospice care for more than 300,000 people living in Hillingdon and surrounding areas.”
The hospice provides free-of-charge inpatient unit, hospice at home, wellbeing, psychological and emotional support, and education and information.
As a charity, only part funded by the NHS, it relies on donations to keep services running.
To learn more about the merger, visit harlingtonhospice.org