By Ali Lyon Talktalk is engaged in mad dash to secure a £200m lifeline from one of its largest shareholders, as In its latest annual report, directors of the private telecoms company said that there was a chance that the embattled firm could become insolvent by “August 2024 or sooner”. They added: “These risks represent a material uncertainty that may cast significant doubt upon the group’s ability to continue as a going concern such that it may be unable to release its assets and discharge its liabilities in the normal course of business.” The warning comes as Talktalk bosses continue their s…