How to declare and prepay excise duty on cigars ordered from abroad

[Lascaux]

the edmundo dantes el conde! the lovely 109s with the nipple cap that begs to be sucked

[rokkitsci]

Jus' wunnerin'

What is this mystery box, monsewer?

P'raps I could be of assistance if I knew WTF we were talkin' 'bout here.

So there is a box of cigars I want to buy from abroad,

[Lascaux]

I just REALLY want this box!!!

So I called them up and after ages of umming and ahhing, they said a C23 form should do, its like a bigger version of the C22 customs declaration you find at post offices. i just want to make sure they tax the proper weight of the cigars and not the entire package. also hope there isnt some other secret form you have to fill out for tobacco goods or anything...

[Lascaux]

So there is a box of cigars I want to buy from abroad, and I want to declare them and pay excise so they won't get destroyed by the good folk at UK borders agency...

But HMRC don't make it easy at all do they??
I'm greeted with a list of hundreds of forms and haven't glot a clue which one to fill in, or how to do it, or how the whole process works?

Does anyone have any experience on this and can offer any help on the process?