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Nigel: I have a circuit written down on paper. I was hoping I would not have to get involved with uploading something, but it seems I will because Al is totally confused.
Al: the transistors are in a totem pole arrangement , neither has any DC bias, they are driven by the transformer thru a 10 ohm base resistor and a 1 ohm emitter R. ( Don't know why they have both.) Without the trigger diode this arrangement will never start oscillating. The output of the Osc drives the transformer primary and the main ballast inductor in series, with these in series with the lamp. ( There is also a diode back to the startup cap to keep it discharged. The startup delay is just a byproduct of this arrangement.)( The designers don't care if the tube starts or not.)
Well that wasn't too hard. I see what I have is largely the same as the Osram circuit. This is a minimum parts design so I don't think the Chinese are going to stop using it anytime soon.