Diagon Alley - where and when is it?

[heiditandy]

Original Yahoo! HPFG Header:
No: HPFGUIDX C6784
From: heiditandy
Subject: Re: Diagon Alley - where and when is it?
Reply To: [Yahoo! #6757] Diagon Alley - where and when is it?
Date: 8/13/00 3:22 pm  (ET)

<< Hmmmm. There's nothing to suggest that Diagon Alley is physically in
 that location - the Leaky Cauldron might be a portal to it, but it may
 actually be located elsewhere. A bit of portkeying to an isolated
 location,
 perhaps? >>

Or some magic like the Weasley's car, where the trunk and seats both
had a lot more space than you could see from the outside.