Saturday deliveries and 5 weekday deliveries seem unnecessary, but universal letter and small (CD-sized) parcel service seems worthwhile. If the logistics work

Saturday deliveries and 5 weekday deliveries seem unnecessary, but universal letter and small (CD-sized) parcel service seems worthwhile. If the logistics work, delivering letters only if there's a first class letter to be delivered, if there's a standard letter that's been waiting more than 2-3 days, or if Royal Mail feel like it (e.g. delivering to this road for someone else's first class letter) might save a lot of money.