Is it any surprise that the mains sewers cannot cope with increased pressure?  By pumping from the new housing estates without increasing the size of the pipe, what happens is the pressure rises.

Consequently the old sewer pipes break.

This is compounded by actions like capping the sewer in Warren road, where it used to regulalry overflow, again moving teh pressure round the system.

I suspect we can expect more of the same…

for more see: http://www.dawlish.com/thread/details/44945