Rule B1.9: Effective communication
1.9.1 You must communicate effectively with your clients and others. This includes providing clients with any relevant information which you have and which is necessary to allow informed decisions to be made by clients. It also includes accounting to clients for funds passing through your hands. Information must be clear and comprehensive and, where necessary or appropriate, confirmed in writing.
1.9.2 You must advise your clients of any significant development in relation to their case or transaction and explain matters to the extent reasonably necessary to permit informed decisions by clients regarding the instructions which require to be given by them. In particular you must advise clients in writing when it becomes known that the cost of work will materially exceed any estimate that has been given and must also advise the client in writing when the limit of the original estimate is being approached.