On 26 March 2010, Lindsay Sampford in Cambridgeshire, United Kingdom, wrote:
"My original starter switch, probably the one that left the factory with the car, was working OK but the rubber insulators on the terminals were decomposing and allowing the terminals to move about a bit. I was worried that they might move enough to short out on the casing and cause a fire, so I decided to change the switch. I went for one of the starter switches that turn up on eBay for about £19, see image. The first one I received started the car three times before it packed up altogether! The vendor sent me a replacement without any fuss, but although it worked, it wan't very convincing in the way it worked, if you get what I mean. It took a good hard pull to get the starter to turn with enough oomph to start the engine. Although the thing has worked for a year it has got steadily worse, and it has been a real struggle to get the car to start at all on the colder days.

So I have replaced the stater switch again, this time for one that looks more like the original. It has the same rubber insulators as the original switch, seems much more robust and starts the car in a very business-like fashion. At around £25 inc. vat. it cost a bit more than the nylon based version, but well worth it. The cheapest one I was able to find came from these people: http://www.vintagecarparts.co.uk --- Part No. ET6-11450-B

For disection of a faulty starter switch, see article FT-004