Today (2005/11/21) I received the following acknowledgement, dated 2005/11/18, via email as a PDF document (containing an image). This is one week after my appeal that I know they received (see earlier posting).
They appear to be taking the 20 days from the date of their acknowledgement letter instead of the day after they receive the request (or appeal).
It isn’t very exciting so if you are interested, here is a link to the PDF document
More when I have it.