[Dodger]

Courier is exactly as you imagine you bring back a envelope or package for BA, nothing dodgy it is passed through customs and sealed and you pick it up just before boarding in BKK and deliver it to the atrium in heathrow.
Downside is that you give them your return date and then pick a departure date, if longer than two weeks they charge extra and if going with a mate okay but only one courier per day so you will have to come home one day apart. Works best if travelling alone bored at home and want a quick cheap recharging in los. Thay also offer the same for hong kong, new york, maldives and somewhere else cant remember at moment, just ask, other airlines offer courier reduced flights as well.