Someone to fix electrics near Bromley, Kent?

[Johnny]

The drainage holes at the rear of the engine got blocked last Winter and it's resulted in a handful of electric problems. Sunroof, indicators come on and off randomly, warning lights for open doors etc. The rest of the car works really well and is in very good condition. I'm not taking it in to a dealer as they charged me £150 for a windscreen motor last year. Anyone in the area up for sorting this?

John