I love this story. thanks for sharing. It's a great conundrum dealing with the HMRC machine. I imagine it as a robot relying on syntax. If it doesn't get the right syntax it defaults to "You owe HMRC £xxxxxx. Please pay within 7 days." To tackle the machine I imagine creating an equal machine that will churn out replies, forever in a loop with the HMRC machine. Then I exit stage left and continue with my everyday happy life.