It seems that the Royal Mail may be doing away with the second class letter delivery but could be reintroducing it under their second option
The second option was to extend the delivery times for letters, so it would take three or more days for most letters but with a pricier next-day delivery service available.
I wonder if that next day delivery would apply to the Scottish Islands? You know how reliable the ferries are like Mull and Storms like Storm Kathleen are getting more and more frequent