This plant is allegedly a modern enclosed plant that produces no smells. I have also received confirmation from Anglian Water that their charge for sewage would be waived, thus I would only pay for water supply (metered, approx £100 per year for a single person household). I was also advised, seperately, that these types of small sewage plants are fairly common in rural Lincs, especially where new developments are concerned.
Cause for concern? I am thinking about potential resale problems later on. The new property is 120 miles away, so I can't just pop in the car and drive there, though I might well take a day or two out to do just that, depending on the responses I receive here.