Internal:
1TB Hitachi 0A38016 Deskstar 7K1000.B, SATA 3Gb/s, 7200rpm, 16MB Cache £54.63
1TB Samsung HD103SI EcoGreen F2, SATA 3Gb/s, 5400rpm, 32MB Cache, 8.9 ms, NCQ £57.49

External
1TB Hitachi 0S00073 SimpleDrive, Black, Turbo-USB, 3.5" External Hard Drive, USB 2.0 £62.09
1TB Seagate Expansion ST more...

Nicer HDD than the F1 (for what I've read). and just £6 more than the last offer of the F1!. It comes with a 3 year warranty.
Just in case, this is a slower disk, but far more silent. It also uses less power.

To get this price, check in the Today Only Section, in the Super Savers subheading. Sorry, more...