Natural England
"This letter contains Natural England’s initial representations on the above documents submitted to and accepted by the IPC for the Kentish Flats OWF extension. These comments reflect our pre-application discussions with the developers and Natural England acknowledges the time and effort taken by them to incorporate our comments and the various opportunities for feedback they have provided. In regards to the Environmental Statement, NE feel that our concerns on the draft ES were discussed at length with the developer and we have no comments to make at this time. We do however note the revisions within the final submitted documents. The aim of this letter is to draw your attention to the HRA and our continuing concerns. Natural England have no outstanding concerns with the main body of the HRA Report or Appendix 1: No Significant Effects Report, as our previous comments appear to have been incorporated within the revised document. As discussed during our telephone conversation in December, our main concerns lay with Appendix 2 and as requested this letter lays out those concerns. This letter is intended to provide more clarity on our position and hopefully help inform you of the background prior to further examination of the application. Overall comments on revised Appendix 2. At present Natural England are still unable to sign off this Appendix of the HRA report as supplying sufficient (clarity of) information to inform an AA. We do note the revisions to the document in line with ours and the RSPB’s comments, however there are several outstanding points that we feel still need to be addressed. Overall our position that we consider the conclusion that the Kentish Flats windfarm extension would not adversely affect the ecological integrity of the Outer Thames Estuary SPA, either alone or in combination may be correct, still holds. However, Natural England considers that the evidence provided in the draft HRA we commented on was not sufficient to support that conclusion. In particular, evidence regarding the magnitude of displacement needed to be re-examined and figures for collision mortality needed to be provided. The comments below reflect our pre-consultation advice. • NE felt there needed to be greater clarity on how the displacement figures have been calculated using the JNCC data. The alternative means of calculating displacement using the actual survey data from KF1 and the extension (as in the earlier draft) ought to be presented too for comparison subject to re-calculation in line with the observed percentage density reduction figures around KF1 (as recommended before). Although we acknowledge that cumulative collision is unlikely to give rise to an adverse impact, an assessment should ideally be informed by the actual numbers of predicted collisions at each windfarm. • There also needs to be much greater clarity on how any displacement interaction figures have been calculated, as it is not clear how reliable this new figure is. • Thus, in addition to providing these new JNCC database derived figures, the report should also present figures based on the pre-construction KF1 survey data and the observed post-construction reductions in densities at varying distances out to 1km (and acknowledge that use of 1km is for comparative purposes only and likely to underestimate displacement out to 2km and perhaps beyond). • On the basis of the information provided there are a range of possible displacement interaction percentage values for the Kentish Flats extension alone: o ranging from 0.4% (using JNCC database and 100% and 50% displacement figures within the OWF and 1km ) through 0.5% - 1.4% (mean winter counts at KF extension and 2km buffer), 1.5% - 2.3% (peak winter numbers at KF extension and 2km buffer) to 2.7% (peak winter number within 2km of KF extension and assuming 100% displacement out to 2km). o Given that the quoted SPA population is an estimate based on the mean of the peak estimate of numbers of birds within the boundary for each winter, the use of peak numbers recorded within the Kentish Flats extension may be the most appropriate way to calculate the percentage interaction. • Therefore, the figures are 1.5% - 2.3%, against an impacted baseline as some birds will already have been displaced in 2009-2011 from parts of this survey area due to the existence of KF1. While this is lower than the 3.1 – 3.4% that was deemed acceptable at London Array Phase 1 alone, we are now dealing with an in combination situation where the KF extension impact will be on top of that which will arise from LA Phase 1. o 12.6% was deemed unacceptably risky in the London Array AA. With the figures currently given in Table 4, excluding Greater Gabbard and Galloper and Thanet (as outside the SPA and LA Phase 2 due to Grampian conditions preventing its construction unless no adverse impact is established) we have an in combination figure of 8.2%, of which the Kentish Flats extension accounts for 0.4% (c 5% of the total). This may constitute a likely adverse in-combination impact (albeit largely due to LA Phase 1). In conclusion, whilst we believe that this proposal is unlikely to have an adverse effect on the SPA alone (or in combination (with the London Array caveat above) we do need to have the evidence to fully support this before we can sign off Table 2 in the HRA Report. I hope that this letter has provided more clarity in regards our concerns and we will be happy to discuss the points raised within this letter."