I love Satrock clothing but normally I'm too skint to afford it but just been looking and their Winter Sale is live now and they've got loads of T shirts at £3.49.
I've linked to the Tees but if you go to the main page there's links that take you to Hoodies, Jackets etc too.
*Thanks to robshill5 below for code - summer15
Edit to add:
Use code WIPEOUT20 for 20% off
10% topcashback also available