You can only exclude separate offices/locations and not products or services.
"The achievement of the certification criteria relies on clear commitment from the company management to
adopting the best-practice principles outlined within the Standard. There is often an assumption by customers
that where a certificate has been issued to a company’s office, all products and not just a selection of
products have been included within the scope of the certificate. It follows, therefore, that the exclusion of
products or services provided by a certificated office shall not be permitted.
Certificates are issued to the company for specific office locations and it is permissible for a company to have
some offices certificated under the scheme and other offices not included in the scheme."
BRC Agents & Brokers 5.2