[spiggytopes]

Mostly good advice. Having done Australia-UK five times last year (pre-COVID) I can speak with some experience:

- Noise-cancelling earphones are a must. I have some expensive cordless Bose headphones that can be worn for hours, even when there's nothing playing. They really make a difference (background roar is more tiring than you realise).

- If you're in economy, don't put anything in the footwell - you will need that space to stretch out. Also, economy headrests have little 'wings' that you can pull out and that you can lean your head against.

- Dress as if you're spending a long day outdoors. For me that's comfortable hiking pants, thin layers, fleece jacket. Wear slip-on shoes that expand, because your feet will swell after hours of sitting. Breast pockets are good to keep boarding passes and passports handy.

- Go into lizard mode. Just accept that it's twelve or fourteen hours and there's nothing you can do about it. This too shall pass.

- Most modern airliners have USB ports at every seat. Bring cables to charge your gadgets.