Can anyone help me? I changed the ink cartridge in my printer today and i know that you aren't supposed to just chuck the old ones away. Can anyone tell me how to safely dispose of them please? Where do i take them?

You can take them to any school I would think, the IT engineer will recycle them. Or you could send for a free thing that you can return to this company and every one recycled they donate £1 to the RSPCA.
http://www.rspca.org.uk/servlet/ContentServer?pagename=RSPCA/HowYouCanHelp/GiveAsYouSpend&articleid=1077813453654

Office World in Town has a recycling facility for empty ink cartridges.

Lots of places have bags where you can send them away for recycling for free. Tesco, PC world etc.

Likewise a lot of charity shops will be able to take your old inkjet or laser cartridges and get them recyled.

You can get rid of them in Staples (bottom of the moor). They have a big recycle bin in front of the service desk.

WHSmiths on Fargate give recycling bags away with teir cartridges.

Office World is closing according to the banner in the car park :( :(

Thanks everyone. I think i'll send it to the rspca site. Cheers!