We've had problems with our downstairs toilet flushing, on and off, for a couple of weeks now. I was having a play yesterday and retired having decided to have a look in the inspection chamber in our front garden today. Having got home from work I've opened up the chamber and too my horror found waste water only a couple of feet down from the lid. This chamber flows the waste from the downstairs toilets of four houses. I then looked in the inspection chamber out the back and found the water level to be even higher. This chamber takes the waste from the kitchen and upstairs from the same four houses. I was prepared to jump in and sort any blockage but as both chambers and not draining the water am I right in assuming that the problem is in the main sewer and should I call Anglian Water? Anything you can throw at me will be appreciated as I don't want to pay a fortune to Dyno-rod and then deal with the neighbours. Cheers in advance Arrser's.