This might well be the cheapest I have seen so far for this item. Using the discount codes below, you can get the TomTom Go 910 for £321.48 delivered from Curry's online. The next cheapest is about £357 from Amazon.
Codes: BPCTT309704NEW & TENEMAIL
Details: With the new GO 910, TomTom has extended its excellent navigation system to cover all of Europe, the USA and Canada and added a host of exciting features.
The new text-to-speech feature announces street and place names and can read out SMS messages in a realistic voice. A built-in microphone cleverly adjusts the volume of voice instructions according to the noise level in the car.
The GO 910 receives and reports alerts as you approach safety cameras, whether fixed or mobile. It also doubles as a handsfree kit for your mobile phone so you can make and receive calls using your touchscreen. You can also set your TomTom to pick up your calls automatically for an ever safer journey. Other smart extras include a built-in MP3 player with 12 gigabytes of free hard disk so you can store thousands of songs or pictures. On top of all this, the GO 910 is still easy to use with its bright, responsive touchscreen and straightforward menus.