Complex sentence: From that time onwards, the fixing has taken place via a dedicated conference line, which was clearly a necessity as some banks moved their London operations away from the close proximity to the Bank of England and gravitated to areas such as Canary Wharf.
Split into simpler sentences: From that time onwards, the fixing has taken place via a dedicated conference line. Something that was clearly a necessity as some banks moved their London operations away from the close proximity to the Bank of England and gravitated to areas such as Canary Wharf.