Zebedee Tring, I was going on what Zak says in his thread about how the process works.. As far as the white lines being replaced with extended double yellow goes, I have a neighbour with a dropped kerb. When the white line is replaced with double yellow lines, the double yellows will reach the new extended doubles on the corner. The extended double yellow lines had already removed 8 spaces and the replacement dy will do away with another two at least!