Art - what a huge shame on the part of the council. In another place you would be lauded as an urban guerilla, improving areas of wasted land! In America, where perhaps they have more open attitude to the initiative of gardeners, some plant up the strip between the pavement and the road - there is a wonderful example in Ken Druse's book 'The Collectors Garden' where Lauren Springer did this and it can only have brought enjoyment to everyone walking by. I would keep those zealous council people guessing for a while but I don't suppose they would give up!