He claims that sources have informed him that one of the estimates was 75,000.
The CML's estimate for 2007 is that there will 45,000 repossessions.
A spokesman for the CML says that there has been no direct communication with the BBC about the 75,000 figure.
But he says: "The CML has been having discussions with the government (about repossessions) dependent on the outcome of a range of policy decisions."
These include decisions on an expanded safety net for borrowers experiencing a temporary loss of income to tomorrow's interest rate decision.
But he says: "We haven’t told Peston anything - Peston has been told by other sources about the number."