Thanks K for the reply
At this stage they have consdered removing the coil, to allow it to be checked.
Unfortunately I don't think the ignition box has any diagnostics, and therefore whether this is the fault is uncertain.
The puzzling factor is that this is a recent problem, as she was running well only a few weeks ago when she first arrived from Western Australia.
The heat aspect is also interesting, although as mentioned was not a problem until now.
I was hoping that the vast experience of UK drivers may shed some light on this type of intermittent failure ... maybe not hot enough in the UK though ???
