Nationally Significant Infrastructure Projects (NSIPs) can be difficult to navigate, and the processes that need to be followed can be complicated and overwhelming. Strategic collaboration is vital across different levels of local government - for communities affected by specific NSIPs and for the county.
We recognise that the process needs to be made as simple as possible, so that local and parish councils can work together effectively and make sure that residents' voices are heard.
What are the benefits of collaborating with other councils on NSIPs?
Combining knowledge from different councils strengthens shared knowledge, fills in gaps and helps build a stronger case for communities. However, it is essential to communicate openly, frequently, respectfully and with honesty to collaborate well.
NSIPs’ planning processes involve a large amount of technical information, creating a heavy workload for local councils who have limited time and resources. By working together, you can share work, knowledge, and even the costs of expert advice. This avoids duplication and is especially important with a few NSIPs happening at the same time.

Also, if you’re making a case to the planning inspectorate (PINS) or talking to developers, a united voice is more effective than a lone one.
What’s more, clustering with other Town and Parish councils can support everyone’s wellbeing because you’re sharing the workload and have others to talk to who understand your experiences. Mutual emotional and practical support can strengthen everyone’s resilience, which is important considering the entire NSIP process can take years to complete.
So, where do you start?
Steps for making your collaboration effective
1. Start with the right NSIPs guidance and resources
The “Getting to Grips with NSIPs” guide helps explain the process in simple terms. It sets out the roles of councils and explains each stage of the NSIP process, from early planning through to the final decision. It also explains what councils need to look out for at each stage and includes definitions of key documents, stages and procedures.
The NSIP Centre of Excellence at Suffolk County Council also offer training and resources including webinars for councils who are new to the process. SALC provides support to its members via the Members Portal.
2. Be clear on who is doing what
Different issues are managed by different councils – so, for example, Suffolk County Council usually manages highways and flooding, while district councils lead on things like noise and landscaping. Once you know who to contact, you can direct your questions properly.
We suggest starting with the County Council’s planning will help provide you with an overview of responsibilities.

3. Agree what each council needs from the NSIP process
Before working together, aim to create a clear idea about what each party wants to achieve, and any barriers to successful collaboration. How will you ensure all voices are heard, manage conflicts of interest, navigate time pressures, and consider capacity and costs?
4. Plan and structure your responses effectively
There are a range of suggested response templates you can use to help turn local feedback into clear and organised responses that highlight key issues and back them up with evidence. This saves time and makes your responses clearer and more consistent across different councils.
5. Ask for help if you need it
If you’re currently feeling overwhelmed, contact us via the SALC Members Portal or email enagement@suffolk-salc.gov.uk.
You can also contact a Clerk whose council is experienced in the NSIP process, such as Red Lodge and Saxmundham.