Q My pond liner has been damaged near the top. Is it possible to repair it, and how?

A Repair kits, along the lines of tyre puncture-repair kits, are available. You shouldn't need to move the edging slabs, but the area to be patched needs to be dry, so you may have to lower the water level a couple of inches below the leak. This could mean removing some of the marginal plants for a while, too.