artificial lagoon, which is designated as a Site of Special Scientific Interest (SSSI) for its winter wildfowl. This would appear inadequate, not least because the government has set a Public Service Agreement (PSA) target to have 95% of SSSI's in favourable or recovering conditionby 2010, and in effect a large part of the mitigation is a commitment to work that may have had to be completed anyway. It is clear therefore that despite the adverse residual impacts on biodiversity and the inadequate mitigation proposed, there has been little effort to follow national planning guidance. As an example the government's Planning Policy Statement 9 'Biodiversity and Geological Conservation' states: "Where a planning decision would result in significant harm to biodiversity and geological interests which cannot be prevented or adequately mitigated against, appropriate compensation measures should be sought. If that significant harm cannot be prevented, adequately mitigated against, or compensated for, then planning permission should be refused. " Furthermore new legislation brought into force as part of the Natural Environment and Rural Communities Act 2006, places a new biodiversity duty upon all public sector bodies. The Act stales: "Every public authority must, in exercising its functions, have regard, so far as is consistentwith the proper exercise of those functions, to the purpose of conserving biodiversity." Again it remains to be seen how TTGDC has 'conserved' biodiversity in this instance. Unfortunately this is just one, albeit high profile, example of the attitude to biodiversity and the system of Local Wildlife Sites adopted by developers and in many cases local planning authorities. Despite the rhetoric, the reality of sustainable development seems as far way as ever. The fungi of a postal delivery Graham Smith 48 The Meads, Ingatestone The Heybridge estate at Ingatestone is a part pre-war, par post-war housing develop- ment on former farmland. It extends between the old London Road, now the B1002, and the London-Norwich railway line. As a boy, in the 1950s, I played Cowboys & Indians on what was then a building site and more than once, while bird nesting, was chased off what remained of his farm by an irate farmer Howgego. In recent times - for more years than I care to remember - I have delivered post to the estate, an association that is about to come to an end with my early retirement. 16 Essex Field Club Newsletter No. 52, January 2007