HI, just read about your irritating boot leak. I have a MK1 & MK3 that had the same problem. I found the solution after months of trying, including being shut in the boot while someone else hosed the car!! The water is coming in BETWEEN the two welded panels underneath the boot seam/gasket, because they are only spot welded and the water syphons up the bottom seam. Take off the bottom part of the seal and use some insulating tape to make a masking bead right across the bottom ledge, then put the beading seal back on top of it. It cured mine!!The telltale sign was when I took the edging seal off, underneath you could see signs of water & rust. Hope you get to read this and more so, try it! All the best,Dave8