During WW2, India faced a lot of violence from the side of the Japanese. During the Burma campaign, the British would have (sometimes I suppose) asked the British government what was actually going or what the condition of the empire was. All I want to know is what was the means of communication between British India and the UK.
Even if the primary means of communications was the cable telegraph, as was usually the case, was this ever disrupted or threatened with disruption? Were any alternative systems actually used, or at least contemplated?