I just come back from a Tesco store in London Kensington, and I so this offer, I asked in customer services about availability, was told that they have only one in stock and that other stores may have more, as I said I want to buy two units.
Description of TomTom GO 910
Maps of Europe, the USA and Canada on hard disk: Door-to-door navigation across Europe, the USA and Canada.
Smart extras: Built-in Mp3 player; 20 Gb (12 Gb free) of hard disk, enough for 1000's of songs and pictures; remote control; and much more.
Clear spoken instructions, including street and place names: TomTom GO 910 speaks some 36 languages in over 50 different voices and can even announce street and place names.
Easy to use: Extra wide 4inch LCD touchscreen gives you smart design and easy to use navigation literally at your fingertips.
Hands-free calling: Doubles as a hands-free car kit using Bluetooth technology. So you can make & receive calls as you drive with just a touch of the screen.
TomTom GO 910 Specification
4.0 inch widescreen WQVGA screen (480x272 pixels, 64,000 colors)
CPU 400 MHz
Lithium-Ion battery (4 hours operation)
20Gb Hard disk
Highly sensitive GPS chipset
Dimensions: 112x81x66 mm
Weight: 340 grams