Question Author
Thanks for the responses, everybody.
My back garden is not very big, and as I am retired I cannot take on extra expense, or any extra physical effort. I just want to enjoy my fresh veg and watch the birds and bees; I find just watching from my kitchen a very soothing and relaxing; it is a bonus if I can sit on my little patio.
I shall keep your ideas in mind when I write to Anglia Water. I'm not expecting them to provide anything like the concerned responses I have been given here.
Once again, thank you all very much, indeed
OS