Well, its early days but so far I am very pleased with the Canon so far.

Duplex printing - check
Colour printing - check
Scan to PDF - check
Automatic document feeder for scanning multiple pages - check
Wireless - check
Max £200 - Check £169 inc vat from Tesco

In addition

Very easy software setup
duplex scanning
very easy wireless setup from multiple printers

Which model did you get. (sounds very like the MX870)

Inks, anyone ? I gave up on Epson because their inks dried and clogged the heads on a weekly basis during summer - I spent more on ink used in head cleaning than in printing. Switched to HP and I have not had a single instance of clogging. Incidently my (other) ten year old printer, an HP Deskjet 710c, a backup so used only once every couple of years, also has had no clogging.

Avtrician,

It was indeed the MX870 and no complaints so far.

We have one at work, the only complaint has been from the office girl cos we chew thru the ink. (Lots of reports every day)