Doesn't quite work like that, unless they send every item individually. Using Tracked 24, for instance, it's £3.99 for a small parcel up to 2kg. That can be a fair few CEs. Even a medium parcel up to 10kg is only £7.49 - that's a lot of CEs!
And these are the prices that regular customers pay; AL have an account so they'll pay less.
It's just so expensive sending items abroad. I guess AL have realised that they can't absorb those costs any more. Perhaps they'll review it and offer discounts on postage if orders from outside the UK appreciably drop.