So just after Christmas I noticed our drain gully was backing up so I called a company out, and long story short, they were blocked due to being in a bad state, roots, cracked, pushed slightly out of line....etc The camera they sent down verified this, but when the guys arrived they noticed that we had a newly flagged yard and asked if they used one of those power compressor things to flatten the sand bed down. I don't think they did but I did tell them that the new flags were laid over old ones to which they said that the weight may have caused some pipe damage..... Anyway all that has been fixed now but I'm left with a sizeable bill... I wondered how I stood insurance wise with this... Could the poss weight related damage I mentioned be classed as accidental damage? Any advice or expertise would be very welcome guys.. Cheers