Posting a letter from North to South

[ziggysego]

Posting from the north to the south is the same as posting from the north to Spain, Germany, France, Italy etc.  A stamp costs 97p.

How does anything ever get to its desired destination in the south? I've a brother down there who's address is something like New Bungalow, Ballyshannon, Donegal. That's it!

When do the new postcodes come in??

Let's all start posting crap to CD's brother.

[5 Sams]

Didn't a letter addressed to "Pat the Bollix, Kerry" reach its destination in Templenoe. 

[deiseach]

I need to do something very 20th century and send something called "a letter" from the North to the South.  It needs to be in Dublin on Thursday.  If i post it in the North today will it be there by Thurs? Brit Mail quote 3-5 working days.  Alternatively I dont live too far from the border could I could nip into the South and use An Post but their website says nothing about how long it will take to get there other than using express post which is guaranteed next day delivery and requires a signature.

Any thoughts/advice/experience of this??

Post it at a GPO. There are no cast-iron guarantees with regular post - there are no cast-iron guarantees with couriers - but I regularly post stuff to Liverpool from Waterford's GPO and it almost always arrives within 48 hours. I would think that would be faster than using a smaller post office in the South.