Where did you find out about the new rates, Gwynneth? I've Googled, but I haven't found anything useful. I charge as closely as possible to the actual mailing cost, and include something for packaging costs (fairly standard with my items) in my prices. My local sub post office is close, so I don't add anything for travel, parking etc. Digital scales are essential, and I use the Royal Mail online price finder to calculate what to charge. I don't get too many unpleasant shocks.