Found two of these in Fleet Sainsbury's today - reduced to clear. It's likely to be available in other stores, but probably easier to find in the grocery stores that have a few bits of tech. £50 for a 2TB portable drive is a bargain at the moment.
I also checked Winnersh, they only had the slims @ £85.
Here's the marketing blurb...
The Seagate® Expansion™ External hard drive by Seagate offers an easy-to-use solution when you need to add data storage to your computer instantly.
Drag and drop file saving, right out of the box
Fast data transfer with USB 3.0 connectivity