Please find below links to some of the most popular manufacturers support pages. From here you will be able to download software such as drivers for your printer, as well as being able to find the relevant contact details.
HP UK - http://www8.hp.com/uk/en/support-drivers.html
Canon UK - http://www.canon.co.uk/support/
Epson UK - http://www.epson.co.uk/support/
Lexmark UK - http://support.lexmark.com/
Brother UK - http://www.brother.co.uk/
HP UK - http://www8.hp.com/uk/en/support-drivers.html
Canon UK - http://www.canon.co.uk/support/
Epson UK - http://www.epson.co.uk/support/
Lexmark UK - http://support.lexmark.com/
Brother UK - http://www.brother.co.uk/
You may also find the following links useful:
Free Optical Character Recognition Tool - http://download.cnet.com/FreeOCR/3000-10743_4-10717191.html
Air-Print compatible printers + More info - http://support.apple.com/kb/ht4356