Up Communications will manage both traditional and social media for the launch.
The special edition album will include a remix of 19 to support war veterans suffering from post-traumatic stress disorder (PTSD). That was the central message of his original song, which reached number one in the UK and several other countries.
All proceeds from the new single will go to Talking2Minds, a charity that supports those suffering from PTSD.
Hardcastle said: "This is the last time I’ll be releasing this song and we’ve brought in Up to get us national coverage for this essential charity."
The album is released on 19 May.
The original song: