Key Takeaways
- A Port Community System (PCS) is the electronic platform that links a port’s inventory to HMRC’s Customs Declaration Service (CDS), so goods can’t be released until the customs declaration is matched.
- HMRC recognises four main Community System Providers (CSPs): MCP (Destin8), CNS (Compass), CCS-UK, and Descartes (Pentant), each covering different ports and cargo types.
- You need a CSP-issued badge to access any port community system, and registration requires proof of identity and a genuine business need.
- The IMO Maritime Single Window has been mandatory since 1 January 2024, and UK PCS platforms already satisfy that requirement.
- Choosing the right CSP is driven by which port you use and whether you move maritime, air, or RoRo freight — not by price, since the systems are port-specific.
What Is a Port Community System?
A Port Community System is the electronic backbone that connects everyone involved in moving goods through a UK port — the port operator, the freight forwarder, the customs broker, the haulier, and HMRC. In practical terms, it’s the system that tracks a consignment from the moment it arrives at the port until it’s cleared for release.
The core job of a PCS is inventory control. When goods arrive at an inventory-linked port, they’re logged into a centralised inventory system. The customs declaration you submit through the Customs Declaration Service (CDS) has to be matched against that inventory record before the goods can physically leave the port. No match, no release. If you’re new to the declaration side of this, our step-by-step guide to UK customs clearance walks through the full process.
This matters because it’s the mechanism that prevents goods from being removed from a port without the correct duty and VAT being accounted for. According to HMRC’s published list of Community System Providers, the four recognised CSPs are MCP (operating Destin8), CNS (operating Compass), CCS-UK, and Descartes (operating Pentant). DHL Aviation runs its own system independently for its air cargo operations.
For an importer or forwarder, the PCS is not something you choose in the abstract — it’s dictated by the port you’re using. If your goods land at Felixstowe, you’re working through Destin8. If they arrive at London Gateway or Southampton, you’re on Compass. Understanding which system applies to your route is the first step to getting clearance right.
The Four UK Community System Providers
HMRC recognises four main CSPs, each with a distinct footprint. Knowing which one covers your port is the difference between a smooth clearance and a stalled consignment.
MCP (Destin8) is the largest maritime CSP. It covers more than 100 UK maritime locations, including Felixstowe, Harwich, London Thamesport, Tilbury, Liverpool, Teesport, Grangemouth, and Aberdeen, plus over 200 External Temporary Storage Facilities (ETSF). MCP was founded in 1985 and handles roughly 750 companies, making it the default system for a large share of UK container traffic.
CNS (Compass) covers 13 seaport locations — Belfast, Birmingham, Chatham, East Midlands, Hull, Immingham, Leeds, London Gateway, Manchester, Portsmouth, Reading, Southampton, and Tilbury — along with approximately 80 ETSFs. CNS also operates CNS Air Courier at Heathrow and Gatwick. Compass was rolled out in phases, with a pilot at Belfast in August 2023 and a full transition for existing users completing through 2025.
CCS-UK is the primary air cargo CSP. It covers most major UK airports, including Heathrow, Gatwick, Manchester, Birmingham, East Midlands, Glasgow, Edinburgh, and Stansted, plus around 20 others. If you’re moving air freight, CCS-UK is almost certainly the system you’ll encounter.
Descartes (Pentant) covers Cardiff and a range of smaller ports, wharves, and berths for marine traffic, Warton Aerodrome for air, plus truck-based ETSF systems and the Dover clearance sites Motis and Stop24. It’s the system of record for the smaller and more specialist locations.
The key point is that these systems are not interchangeable. Each port is wired to a specific CSP, and you access that port’s inventory through that CSP’s platform. A forwarder clearing goods at both Felixstowe and London Gateway will hold badges for both Destin8 and Compass.
How a PCS Works with CDS and Customs Clearance
The relationship between a Port Community System and CDS is the heart of UK customs clearance. CDS is HMRC’s system for processing declarations; the PCS is the port’s system for tracking physical goods. They have to talk to each other. For a deeper look at the declaration platform itself, see our guide to the Customs Declaration Service.
At an inventory-linked port, the flow works like this. Goods arrive and are entered into the port’s inventory under a Temporary Storage (TS) model. You submit your customs declaration through CDS. The PCS then matches your declaration against the inventory record. Only when that match is confirmed does the port release the goods.
This is why the declaration reference and the inventory reference have to align precisely. A mismatch — a wrong container number, a typo in the consignment reference — will hold the goods at the port until it’s corrected.
Not all ports use the inventory-linked model. RoRo ports, which handle accompanied and unaccompanied trailers, use a pre-lodgement model built around the Goods Vehicle Movement Service (GVMS). GVMS was introduced after Brexit to handle the movement of goods through RoRo ports without the traditional inventory system. Some ports operate a Mixed Model that combines inventory-linking with GVMS, depending on the cargo type.
The practical consequence is that the clearance process differs by port. A container arriving at Felixstowe goes through the inventory-linked Destin8 flow, while a trailer arriving at Dover goes through GVMS. Getting this wrong — for example, assuming a RoRo port works like a container port — is a common source of clearance delays.
CSP Badges: Registration and Access
To use any port community system, you need a CSP badge. This is a unique credential — a username and password, or a digital certificate — issued by the CSP that controls the port you’re using.
The badge is not a single national credential. Each CSP issues its own badges, so a forwarder working across multiple ports will hold multiple badges. A badge for Destin8 does not give you access to Compass, and vice versa.
Registration requires proof of identity and a demonstrable business need. The CSP will ask who you are, what you’re moving, and why you need access to that specific port’s inventory. This is a security control as much as an administrative one — the badge is what ties your declarations to your identity when goods are released.
For most importers, the badge is held by their customs broker or freight forwarder rather than by the importer directly. The broker submits the declaration and holds the badge that lets them interact with the port’s inventory. If you’re an importer, your job is to make sure your broker holds the right badge for the port your goods are arriving at — and to flag it early if they don’t. If you’re weighing up whether to use a broker or a forwarder for this, our comparison of customs brokers and freight forwarders sets out the difference. Note that whichever route you take, you’ll still need an EORI number before you can submit any declaration.
The IMO Maritime Single Window and UK Compliance
Since 1 January 2024, the International Maritime Organization’s Maritime Single Window has been mandatory for all IMO Member States. It requires the electronic exchange of information for ship arrivals, stays, and departures, replacing the patchwork of paper and manual reporting that previously existed.
The UK’s Port Community Systems already fulfil this function. The PCS platforms handle the electronic reporting that the Maritime Single Window requires, which means UK ports were largely compliant before the mandate took effect. For importers and forwarders, this is background infrastructure — but it’s worth knowing that the systems you interact with are also doing the regulatory heavy lifting for vessel reporting.
The practical takeaway is that the UK’s PCS infrastructure is aligned with international standards. If you’re importing from a country that has been slower to adopt the Maritime Single Window, the friction is more likely to be on the origin side than on the UK side.
Choosing the Right CSP for Your Operations
You don’t choose a CSP the way you choose a software vendor. The CSP is determined by the port, and the port is determined by your supply chain. But there are still decisions to make.
First, map your ports. If you import through Felixstowe, you need Destin8. If you import through London Gateway or Southampton, you need Compass. If you move air freight through Heathrow, you need CCS-UK. If you use a smaller port like Cardiff, you need Pentant. Most forwarders hold badges for several CSPs precisely because their customers use different ports.
Second, consider your cargo type. Maritime container traffic, air cargo, and RoRo freight each run through different systems. A forwarder that only handles air freight may never need a maritime CSP badge, and vice versa.
Third, think about your broker relationship. The badge is typically held by the broker, not the importer. When you onboard a new broker, confirm they hold the badge for the specific port your goods will arrive at. This is a simple check that prevents a lot of last-minute clearance problems.
Finally, watch for change. The CNS Compass rollout is a reminder that these systems evolve. Ports migrate between systems, and new functionality is added. Staying current on which system covers your port — and whether that’s changing — is part of keeping your clearance process reliable.
Frequently Asked Questions
What is the difference between a Port Community System and CDS? A Port Community System tracks physical goods at a specific port, while CDS is HMRC’s national system for processing customs declarations. They work together: you submit your declaration through CDS, and the PCS matches it against the port’s inventory before releasing the goods.
Do I need a CSP badge to import goods? You need access to the relevant port community system, which requires a CSP-issued badge. In practice, your customs broker or freight forwarder usually holds the badge on your behalf. You should confirm they hold the right badge for your port.
Which CSP covers Felixstowe? Felixstowe is covered by MCP’s Destin8 system. Destin8 also covers Harwich, London Thamesport, Tilbury, Liverpool, Teesport, and many other UK maritime locations.
Which CSP covers London Gateway and Southampton? London Gateway and Southampton are covered by CNS’s Compass system. Compass covers 13 seaport locations and around 80 External Temporary Storage Facilities.
What is GVMS and when is it used? The Goods Vehicle Movement Service (GVMS) is used at RoRo ports for the pre-lodgement model, where goods move by trailer rather than through a traditional inventory-linked system. It was introduced after Brexit and is used at ports like Dover.
Is the IMO Maritime Single Window relevant to UK importers? The Maritime Single Window has been mandatory since 1 January 2024, but UK Port Community Systems already satisfy its requirements. For importers, it’s background infrastructure rather than something you need to act on directly.