Regretfully, due to the conditions imposed by our courier partners, we cannot offer an absolute guarantee of your collection. This is applicable to both domestic (UK and EU) and international (incl. outside EU) shipments.
The ability of the courier company to provide the service advertised is subject to many external influences beyond their own control (e.g. unexpected transport delays). Courier companies will not guarantee collections for this reason. Once a parcel is in the courier's possession, they are much more able to influence and deliver it within service standards. Therefore, any guarantee offered by the courier company only starts once a collection has happened and, even then, only to the point of final delivery.
Most parcels are delivered within the service standard and in many cases they are delivered well within the available time. If you have a delivery that must be delivered by a set time please consider the service options carefully.