This article is within the scope of WikiProject Trains, an attempt to build a comprehensive and detailed guide to rail transport on Wikipedia. If you would like to participate, you can visit the project page, where you can join the project and/or contribute to the discussion. See also: WikiProject Trains to do list and the Trains Portal.TrainsWikipedia:WikiProject TrainsTemplate:WikiProject Trainsrail transport articles
This article is within the scope of WikiProject Wales, a collaborative effort to improve the coverage of Wales on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.WalesWikipedia:WikiProject WalesTemplate:WikiProject WalesWales articles
The article states without references: "a mail coach operated almost daily from London to Holyhead, taking 45 hours to make the journey."
I think the distance is something like 250 miles these days but would have been a lot more circuitous in the era of the post coach. at the present day if that distance is still the same as I recall that pace would have required about 5 mph non-stop.