So that I could lay the patio flags right up to the house I've broken up the concrete path that ran across the back of the house with a sledge hammer (not easy as the path was up to five inches thick in places!). Of course something had to go wrong and in removing the concrete from around a rain-water gulley I've cracked the clay gulley (down at the bottom so the water in the trap just drained out!). Spent all morning digging that out because it was set in concrete itself. Replaced it with a plastic gulley but I needed 9" of piping to reach from the differently designed gulley to the drain. Builders merchants tell me that the shortest length of pipe they sell is 3 bloody metres - so I had to buy 9' 9" of pipe to cut 9" off the end! (Still I suppose it will come in handy sometime!).
Why are things never simple??!!