I just cann't get my head around this bit of Gobbledegook from BT's latest Update brochure:-

"From now on, if a product or service is provided, changed or given up on the first of the month, we'll calculate the charge or refund until the end of your current billing period by dividing the quarterly charge by the appropriate number of complete months. If the charge occurs after the first day of the month, fees will continue to be charged or refunded until the end of the current billing period, based on the remaining number of days within that period. "

Instinctively I just know it's going to cost me more , but the statement appears totally confused and meaningless.   Can anyone tell me what it's supposed to mean ?

I recently had a BT line changed over into my name.   While BT confirmed it would happen on 30 September (after a weeks notice), they didn't actually do it until 3  October (ie beyond 1st of the next month).  Have I been stiffed again ? (I'm billed quartely)

Thanks for that.   I doubt if it'll win any prizes, but I've nominated it just the same.

Maybe it's not half as bad as I'd feared then   and as  my recent experience of changing over a line [ see thread:- 
http://www.saynoto0870.com/cgi-bin/forum/YaBB.cgi?board=news;action=display;num=1128982940  ]  perhaps confirms.    Thankyou for your explanation. 
I've also asked BT to explain it to me too and wait to see if that'll make it any clearer.