The British Telecommunications (BT) business call volumes decreased from approximately ** billion minutes in 2009 to approximately *** billion minutes in 2024.
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Ofcom. (April 8, 2025). Business call volumes of British Telecommunications (BT) in the United Kingdom (UK) from 2009 to 2024 (in millions of minutes) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 30, 2026, from /statistics/288347/bt-business-call-volumes-annually-in-the-uk/
Ofcom. "Business call volumes of British Telecommunications (BT) in the United Kingdom (UK) from 2009 to 2024 (in millions of minutes)." Chart. April 8, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 30, 2026. /statistics/288347/bt-business-call-volumes-annually-in-the-uk/
Ofcom. (2025). Business call volumes of British Telecommunications (BT) in the United Kingdom (UK) from 2009 to 2024 (in millions of minutes). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 30, 2026. /statistics/288347/bt-business-call-volumes-annually-in-the-uk/
Ofcom. "Business Call Volumes of British Telecommunications (Bt) in The United Kingdom (Uk) from 2009 to 2024 (in Millions of Minutes)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 8 Apr 2025, /statistics/288347/bt-business-call-volumes-annually-in-the-uk/
Ofcom, Business call volumes of British Telecommunications (BT) in the United Kingdom (UK) from 2009 to 2024 (in millions of minutes) ÌÇÐÄÆƽâ°æ, /statistics/288347/bt-business-call-volumes-annually-in-the-uk/ (last visited July 30, 2026)
Business call volumes of British Telecommunications (BT) in the United Kingdom (UK) from 2009 to 2024 (in millions of minutes) [Graph], Ofcom, April 8, 2025. [Online]. Available: /statistics/288347/bt-business-call-volumes-annually-in-the-uk/
