Thanks chaps! I don't think the in ear jobbies will suit for the flight, because Madame has not yet managed to get any in ear phones that don't violently disagree with the shape of her ear 'ole. I don't seem to get on too well with them either but strangely, the ones that came with my Samsung phone aren't at all bad. My usual headphones for portable use are Sennheiser PX200s. I'll probably try buying a set of PXC250-IIs to start with.
We are not frequent flyers, far from it, but never having flown farther than Madeira, all the way to the land of the Auk is a bloody long flight! Now will it be Air New Zealand, or Singapore Air, which lead the recommendations I've had from ex-work colleagues. Now, is a newish A380 any quieter than a 16 year old 747? Either way, it'll be cattle class, as the price of upgrading is horrendous.
I'll ask a few motorcyclists about what they use for the Le Mans effort, if that isn't the answer then i think plan A, i.e. ear defenders over Samsung in ear phones will be it. Luckily Le Mans cars are getting quieter, especially the diesels, which make a less exciting, but less brain liquidising sound.