use better regrex

rca/settings/base.py

@@ -733,7 +733,7 @@
  "rca.scholarships.birdbath.ScholarshipEnquiryFormSubmissionAnonymiser",
 ]
 BIRDBATH_REQUIRED = env.get("BIRDBATH_REQUIRED", "true").lower() == "true"
-BIRDBATH_USER_ANONYMISER_EXCLUDE_EMAIL_RE = r"torchbox\.com$"
+BIRDBATH_USER_ANONYMISER_EXCLUDE_EMAIL_RE = "@(?:torchbox\.com|rca.ac.\.uk)$"
 
 # Django Countries
 # https://pypi.org/project/django-countries