I'm sorry this is so sweet. I have nothing else to say, it's very cute and that is that.
Vintage white ceramic mug. The Tetley cartoon man (who is he) is resting in a fenced yard, a rainbow in the background. He's drinking a cup of Tetley out of a mug that reads "Gaffer" and has a pleasant expression on his face. In blue: "Tetley brings you 'round." Geez louise! "Staffordshire Kilncraft made in England" stamped on base.
3.5" tall
2.75" opening