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Well it did and its now resolved, just wanted to share so it helps someone out that's all. Take it or leave it

Yes these ducts are held in place underneath the airbox itself you have to remove the airbox and preshaped ducts all in one to take screws out wished I'd taken pics a would have been easier to explain. So take tank off, then remove the whole air box from carbs turn upside down and two screws hold the ducts on place and you should see the silicone around them if anything like mine they will not be held by the silicon as it had shrunk and cracked.

Hi there I think I might have the answer, I to had a miss fire and splutter in driving rain and driving rain only, its took me two years to finally fix the issue and it's 100% fixed, it's not the electrics it's not carb icing, what I was suspected was definitely the fault water was getting into the airways, the seal on the inlets was the issue, they looked fine but if you undo the screws holding the two shaped air ducts they just fell out, silicone had perished causing air gapes round the intakes, re silicone with high temp silicone and issue as gone, I've been riding in the rain on purpose heavy driving rain not missed a beat, even at high speed well 80mph in the rain no issues, hope this helps anyone took me two years to find. People told me it was electrics but I'm an electrical engineer and wsnt having it. I tested every bit of kit on the bike, my relief when I git to the bottom of this issue. Not saying it will be your issue but def mine, now not scared to ride in the rain. What a joy