Don't book “Delivery Guarantee” – it's counterproductive! I used Parcel2Go and paid extra for “Delivery Guarantee.” Parcelforce didn't collect the parcel on the date agreed. As a consequence, the parcel wasn't delivered on the day it was expected. When I wanted to claim the refund*, I was told: “The delivery guarantee does not guarantee the collection date just the delivery time once the parcel has been collected.” This means Parcel2Go and their partners have an incentive not to collect your parcel at all when they have the slightest doubt they can deliver it in the time agreed — which in turn means you're better off without the guarantee! * “If you purchase Delivery Guarantee, you will be entitled to a full refund of the carriage if your parcel is not delivered by the pre-agreed date.”