I ran an estate-agency-prospecting offer to our mailing list five times. Here's what changed between runs.

It's for UK course creators sending one offer to a list they already have, not for paid traffic. I'm taking the next twenty minutes of a live clinic to walk through the five tests I ran on our own £499 lead-generation offer: the one-line cold-email rewrite, subject-line length, mid-email link placement, the follow-up timing, and the light qualification note. Two moved conversion from around 0.8% to 3.1%, three did nothing or made it worse. Bring one actual offer you have already sent and the numbers; I'll tell you honestly where I think the leak is. This is not a copywriting masterclass.