Accepted cartridges can be found here: http://www.emptycartridge.co.uk/uimages/File/Cartridges-we-accept.pdf
If you only have small quantities of inkjet's cartridges then you can send them via the freepost address (Max 2KG including packaging).
315714
Empty Cartidge Recycling Ltd
Freepost RSKZ-YJGS-CRUT
PO BOX 6291
Milton Keynes
MK1 9FR
(PLEASE DON'T SEND ANY EPSON / CANON TANKS / RIBBONS OR LASERS VIA FREEPOST, AS WE MAY BE CHARGED THE POSTAGE)