I called out Thames Water to unblock a main sewer drain on the road as it began backing up into my external gullies / drains. On the the of the job, they sent out Lanes Group to carry out the work. There were 5 engineers, and they managed to flood my garden and destroy a huge retaining wall. Currently stuck with them in an investigation over liability, but costs are likely to be ATLEAST £30,000 to repair everything. Has been two months already and still "ongoing". Absolutely horrendous care for their work. Thames Water claimed ZERO liability for the incident and told me to deal with Lanes Group (their contractors). I wasn't even aware they hired out contractors till after the incident. How was I supposed to know they were contractors when they are wearing Thames Water branded uniforms and equipment, and didn't even provide any introduction. Stuck in horrible investigation now for OVER 2 MONTHS!