Hammock/tarp, sleeping bag opened out as a quilt, jury’s out of if a sleeping pad is necessary in the UK in July. I’ve got a self inflating 3/4 mat I could take.. it might be decided by how well / where it fits on the bike.. if I find an easy place for it I’ll take it, if not possibly leave it out.
What hammock set up are you taking? Hammock + sleeping bag + pillow?