Just back from Asda Living at the Fort Shopping centre in Glasgow and they had the Binatone b430 uk & ROI for £40.
They also had the Western Europe one for £50.
They had loads of the wee cards on the shelf that you need to take to the counter to purchase. so I would presume they have decent stock.
Super bright, anti reflection 4.3" touch screen
High Sensitivity GPS Receiver
Super Slim Profile
Multi - Language & User Friendly Interface.
Uk and Ireland Mapping
Clear Voice direction guidance
Amazing 2D & 3D Navigation View.
Hopefully someone else can confirm availability elsewhere.