Unlike a local planning application, offshore windfarms are ultimately approved by a central government body, currently the Infrastructure Planning Commission (IPC).  This means that local and county councils, or unitary authorities have no responsibility for the decision.  Many organisations are consulted as "statutory consultees" on the plans.  These organisations include relevant councils, Natural England, the Maritime Coastguard Agency, the Ministry of Defence and a host of others.  It is important, therefore, that these consultees are fully informed and aware of public opinion in their respective areas of interest.  Just like the public, these consultees have the ability to influence the outcome of a planning application by their feedback in the consultation process.

The public consultation process is detailed in Eneco's Statement of Community Consultation.  "Phase two" of public consultation on the offshore elements of the development, began with its exhibitions in February 2012. Eneco should analyse the public responses, identify concerns and address them if it can (although it is not obliged to change its plans at all).  There will be a response from Eneco later in 2012, and a further opportunity for you to express your views on the revised plan. 
After that, Eneco will be in a position to apply for permission to proceed (which may be refused, of course).  You can also make submissions directly to the Infrastructure Planning Commission in a limited period after Eneco has filed its final application.