Another vote for Cartridge People if you want originals.
Always get complete packaging with long expiry date, and delivery is quick.
They also do compatibles.
Latest Which? (August) has a large report on printer inks.
Top-rated online suppliers are Firstcallinks.co.uk, Inkredible.co.uk, Internet-ink.co.uk and Refreshcartridges.co.uk.
Lol. I think Minty recommended this company on a similar thread a few years back. I have used them since with no problems on my HP3500 series All in One using compatibles (H
364), I now have a cheap Canon bought recently and am yet to try their Canon compatibles.