I was refering to package holidays in my example as its standard 15 KG and the 3 for 2 offers an extra 5 to make it 20
alasdair, as you posted that on an airline forum, perhaps for the sake of clarity you should have said that then, as it isn't something the airline offer. It's offered by the TO/TA and doesn't apply to all packages that they sell.
We offer this on all of our flights
Congratulations! Ambassador to employee