It means the NHS target has now not been met for nearly three years.
And while there were slightly more referrals for urgent cancer investigations in February compared to the previous month, Macmillan said the number of people starting treatment "remains lower than it would expect".
Sara Bainbridge, the charity's head of policy, said: “This data further illustrates the catastrophic impact of Covid-19 on cancer diagnosis and treatment.
"It’s vital that cancer services continue to be prioritised and that those with cancer are not forgotten.
"To address the extensive challenges that lie ahead, the NHS urgently needs a long-term, fully funded plan for its workforce, ensuring there are more dedicated staff who are able to provide the best care for cancer patients, now and in the future."