A customer with a 1997 R1100RT has recently been exempted from london ULEZ charge using the BMW certificate of conformity.....
He was knocked back originally by TFL as it didn't show the NOX emissions.
So he got back to BMW and asked them to add the emission data needed by TFL for exemption (same as supplied on the certificates for the 1150).
BMW obliged ( he said it looked like someone at BMW had just typed an additional line on the paperwork
) , and bingo, his old 1100 is now exempt with no expensive special test required 
He was knocked back originally by TFL as it didn't show the NOX emissions.
So he got back to BMW and asked them to add the emission data needed by TFL for exemption (same as supplied on the certificates for the 1150).
BMW obliged ( he said it looked like someone at BMW had just typed an additional line on the paperwork
) , and bingo, his old 1100 is now exempt with no expensive special test required