Macmillan Cancer Support
This number is listed by Macmillan Cancer Support on its own website (Macmillan Support Line for people affected by cancer).
Source: “Call the Macmillan Support Line for free 0808 808 00 00” (opens in a new tab). Checked 14 October 2026.
This could still be a scam call
Criminals can make their number look like a genuine one (this is called spoofing). If someone calls from this number and asks for money, bank details, a code or passwords, hang up. Then call Macmillan Cancer Support back on a number you've found yourself, such as the one on their own website or on a letter or bill from them.