Resistor Value - Glow Worm Compact Electronic?

Hi All,
a last ditch attempt to fix a Glow Worm Compact Electronic combi boiler.

The main PCB has a burnt out fuseible resistor, R42 and I can't read the original value due to scorching.

Of the resistor bands that are left it looks like the second band is white, which would mean that the value must be something beginning with 39 (390R, 3K9, 30K9, etc., etc., etc., preferred values). Nothing left of the multiplier band and so it's a real guess. In fact the second resistor colour band may not even be white, may just of been scorched white??

Does anyone have a Glow Worm Compact/Mainboard they can have a quick look at? The resistor in question (R42) is below the first connector on the left, between the two black enclosed relays and above the high-voltage transformer.