Yeah he's actually a very good one. I know it looks shayte, and I could possibly have done it myself, but we spent some time examining every inch of the pipe, and there just wasn't anywhere it could be done properly - every section of pipe had a problem, from the ground up - whether the pipe was kinked, oval, bent, covered in old solder etc etc.
I'm usually quite critical of tradesmen who do anything that looks like a bodge, but I honestly don't know anything else he could have done, short of digging the conrete up and putting a clean bit of pipe in