"Must be regional since DPD are the best couriers IMHO"
Perhaps it is. But I can only go with what I know, and of around ten parcels I've had shipped to me by DPD only one has arrived on schedule. Because their local collection depot is inaccessible to me as a non-driver I have to be home for those deliveries, so all in all I've wasted at least a week's leave waiting for parcels that never arrived.
My experience with Royal Mail is also the opposite of yours. Their local sorting office is open until 7pm every weekday, 8pm Wednesday, and it even opens on Sunday. A lot of stuff also gets deposited at the local post office just down the street, which as part of a corner shop stays open until 6.30.