MGTF electical trickery

Hi all, we have a 2002 TF 135 with aircon in which the boot lock and SRS warning lights will sometimes glow. The intensity of the glow increases with the speed of the heater fan. Also, randomly the radio will switch off then back on after a few seconds when the headlights are turned on or when full beam is selected. Any clues as to the causes, please? Adam

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