are, i believe produced exclusively for Dixons group. The unit itself looks very well specced for the price. The only limitation that i aware of is that the unit comes with 512MB RAM, but has no expansion port to increase the RAM.
Having said that, a similar spec unit from Toshiba (Libretto series) or Sony (S range or T Range) will be well into 4 figures.
I guess if you are likely to need more than 512MB RAM, look at the alternatives, if not, the Philips looks like a very good option.
Hope this helps.