Jozza, I have had mine two years now, it's not my everyday car so it isn't called upon to be ultra reliable, but it's never once failed to start and never failed to complete a journey. The only problems I have had have been a failed water pump seal causing a coolant leak, this needed a new pump at about £40.00, and a faulty Brake servo which caused the brakes to drag. I made this one worse by changing the Servo to an Ebay special which leaked air and made the engine run rough. I had to bite the bullet in the end and bought a new Servo at about £150.00. The master cylinder needed cleaning out as well. BTW the later Cars after about 1971 had twin circuit brakes with dual servo's, these can be an absolute pain to set up.
The seals on the clutch m/c failed as well, but this fortunately happened to the guy who was doing some body restoration work for me, so he fixed it with a new master cylinder.
By far the biggest issue is not reliabilty but rust, this should be less of a problem for you guys down under, but it can be a real problem for us.
Electrical problems are no worse than any other classic, the systems are quite simple but some of the componants are a bit naff (Light assemblies for instance). The mechanical engineering is first class though, OK they are old cars but they were designed and built well, I have over 200.000 Miles on the clock now and although lot's of parts have been changed or overhauled it all still works.
