I use the Dvorak keyboard layout, but Windows does not include a United Kingdom variant. I've therefore created one, which is available for download from the Attachments section below. This is based on the United States Dvorak layout included with Microsoft Windows. My layout modifies Shift-3 to type the pound sign (£), swaps the @ and " keys and moves # and ~ to their standard UK location.
United Kingdom-Dvorak.zip" file from this page and extract it on your computer. From the extracted folder, run setup.exe. This will install the new keyboard layout on your computer. You can then select it from the Control Panel. On Windows 7, these settings are under "Change keyboards or other input methods".
This layout was created using the Microsoft Keyboard Layout Creator tool. The source file, ukdvk.klc, is available in the Attachments section below. If you're not happy running executables from random pages (and you shouldn't be!), you can use the tool and my source file to create your own.
This is based on the United Kingdom Dvorak layout that is included on UNIX/Linux systems that run XKeyboardConfig.
An alternative version which maintains more of the standard UK punctuation keys is available from http://www.tarind.com/ukdvorak.html.