Are there any regularly updated stats available which show the time in days taken by the Royal Mail to deliver letters?
Maybe on a week by week basis, so I could look at the stats and say: "If I order a widget and it is sent by first (or second) class letter mail right now, then it will probably take approximately x days."
Of course my question reflects the current Xmas/New Year arrangements as I am going to need to have parts delivered despite the holiday season.
I would far rather prefer not to have the cost of a courier delivery especially as it is inconvenient for someone to stay in for the delivery.