Love this ale, and have paid the full £3 before. So filled my boots this time, but there were still quite a few in the shelf when I left.
Also had a few others marked down to the same price with northern monk Scafell IPA being another one.
Tescos seem to be changing what they stock craft ale wise, so have marked quite a few down in the last couple weeks so worth a look next time you are in.
BBE August on the ones I picked up.