Yet another recommendation for David Odonnell and Patrick. They did a small job for us earlier this year, fixed some box guttering which had been leaking for two months, and despite getting installer back twice (he couldn't fix it) David fixed it immediately. He's just been back to fix two more leaks - one, some original cast-iron guttering which had corroded and been patched in the past. He replaced it with plastic guttering, job was done neatly and it looks fine and no longer leaks. He also replaced other guttering which I had had repaired twice and still leaked. At last a roofer who knows what he's doing. He explains the problem, fixes it and gives a guarentee. Very nice to deal with and very professional.