MGB Breakdown advice - ideas needed

[1966marden]

Hi - I have a 1978 standard spec. rubber bumper MGB GT that keeps "cutting out". The car will run perfectly for many miles and then, all of a sudden, the ignition light comes on, fuel gauge falls, wipers stop if in use, etc. and the car rolls to a quiet stop at the verge - no lurches, splutters. It then takes 10 minutes or so before it will restart, usually after a few goes, up goes the gauge, etc. and it drives away for another 30,40, 50....miles perfectly. Starts cold first time, idles lovely, etc. Recent new plugs, battery,...Any ideas...?? Help much appreciated..

[1966marden]

Thanks for this - I will check the relative parts suggested. With the power loss, the wipers stopped but I think the side lights were still on..? Any other possible thoughts? Thanks in anticipation.

PS. Located on Welsh borders.

[1966marden]

Thanks for this advice - can you be more specific about this starter relay under the bonnet mentioned above?