CH pump is running and everything else looks normal. My first thought is that as the boiler has tried to fire then the water thermostats and zone valves must be ok and this is an ignition problem. Looking at the fairly vague manual there are electrodes which should be adjusted to a 3-4mm gap. It would help if it said a bit more about where they are! Alternatively maybe the photo resistor is not detecting the flame properly.
Boulter Camray 2 Boiler Manual
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