Several points here.
I (we) are Licensing Agents for BW. There are quite a few of us but BW don't advertise our existence much.
You can go to an agent and renew your license. It's a bit like the Post Office and Passports. We'll check all the paperwork (no charge) and send everything to BW for you. We even give you a receipt to display on your boat.
License fees include VAT @ 17.5% so they will have to come down from 1/12/08. However, if renewing during 2009 there'll be an interesting situation, cos part of the license period will relate to 2010 and by then we'll be back on 17.5%. The VAT man may have something to say about that but it's too early to tell.
To qualify for the Prompt Payment discount you must pay IN FULL before the start date of the new license - i.e. on or before the last day of the month preceeding when the new license will start.
If you pay by Direct Debit you cannot receive the Prompt payment discount.
By the way, you don't need the reminder.