The references I have don’t quote a wing section, but one does say that the wing was developed with the co-operation of the NPL and was a laminar flow wing section with the maximum thickness at ‘about’ 42% of wing cord. AFP says that the wing spar for the Spiteful/Seafang was at 40% chord.

The contemporary Flight article on the Attacker says:

At the root the maximum thickness is at 40 per cent of the chord and at the tip at 42 per cent