Drone Rules in Portsmouth — Military Airspace & Historic Dockyard (2026)

CAA Registration Requirements

All UK drone pilots flying aircraft weighing 100g or more must hold a valid Flyer ID, obtained free of charge by passing the CAA online theory test. Drones weighing 250g or more additionally require an Operator ID at 12.34 GBP per year, and this ID number must be displayed on every aircraft. These requirements apply across the whole of Portsmouth.

HMNB Portsmouth — Military Restrictions

HMNB Portsmouth is the home of the Royal Navy's surface fleet and one of the most sensitive military installations in the United Kingdom. The base occupies a significant portion of the western side of Portsea Island, and military byelaws and the Official Secrets Act create strict prohibitions on aerial surveillance of defence sites.

Flying a drone over or near HMNB Portsmouth is prohibited. The Ministry of Defence has the authority to take action against any unmanned aircraft that poses a threat to military operations or security. This goes beyond standard CAA enforcement and can involve military countermeasures. The area around the base should be treated as an absolute no-fly zone for civilian drones.

Historic Dockyard

The Portsmouth Historic Dockyard, home to HMS Victory, the Mary Rose Museum and HMS Warrior 1860, sits within the wider naval base perimeter. Even though the Dockyard is open to the public as a tourist attraction, it remains MOD property. Drone flights over or from the Dockyard are not permitted for civilian operators.

Portsmouth Harbour and Langstone Harbour

Portsmouth Harbour is a busy waterway used by the Royal Navy, commercial ferries, fishing boats and recreational vessels. Drone flights over the harbour raise concerns about interference with vessel operations and navigation safety.

Langstone Harbour, to the east, is a Site of Special Scientific Interest and Special Protection Area for its bird populations. Flying drones over Langstone Harbour during bird nesting season (March to August) risks disturbing protected species, which is an offence under the Wildlife and Countryside Act 1981.

Southsea Seafront and Common

Southsea is the residential and leisure area occupying the southern portion of Portsea Island. The seafront promenade, Southsea Common and the Clarence Pier area attract large numbers of visitors, making them congested environments under the Air Navigation Order.

Flying over these areas under Open Category rules is not feasible when crowds are present. Even during quieter periods, the proximity to residential buildings means you must satisfy the 150-metre separation rule under subcategory A3, or hold an A2 CofC and maintain at least 30 metres from uninvolved persons under subcategory A2.

Southsea Common itself is managed by Portsmouth City Council, and any drone activity there must comply with both council byelaws and CAA regulations. Early morning flights on the Common, when visitor numbers are minimal, offer the best chance of compliance.

Hilsea Lines and Farlington Marshes

Hilsea Lines, the historic fortifications at the northern end of Portsea Island, offer open green space that may appear suitable for drone flying. However, the area sits close to the A27 and the motorway junction, and the approach paths for any military air traffic using the harbour area should be considered.

Farlington Marshes, a nature reserve east of Portsmouth managed by Hampshire and Isle of Wight Wildlife Trust, is a sensitive habitat for wading birds and wildfowl. Drone flying over the marshes is likely to disturb protected species and should be avoided, particularly during migration periods and nesting season.

Gosport and the Western Shore

Gosport, across the harbour from Portsmouth, adds another layer of complexity. The former HMS Sultan site, Haslar barracks and other MOD facilities in Gosport mean that military restrictions extend beyond Portsea Island itself. Always check the CAA Drone Safety Map and any active NOTAMs before planning a flight on the Gosport side of the harbour.

General Flight Rules in Portsmouth

• Maximum altitude of 120 metres (400 feet) above ground level
• Visual line of sight must be maintained at all times
• Never fly over congested areas or gatherings of people
• Never fly over or near MOD installations or military vessels
• Keep at least 50 metres from uninvolved people (30 m with A2 CofC)
• Do not disturb wildlife at protected sites
• Fly only during daylight unless specifically authorised

Penalties

Flying without registration can result in fines of up to 1,000 GBP. Breaching airspace restrictions carries fines of up to 2,500 GBP. Flying near military installations can lead to investigation under the Official Secrets Act and serious criminal charges. Disturbing protected wildlife species is a separate offence under the Wildlife and Countryside Act 1981.

Steps Before Flying in Portsmouth

1. Obtain your Flyer ID (free) and Operator ID (12.34 GBP/year) from the CAA
2. Label your drone with your Operator ID
3. Check the CAA Drone Safety Map for military and FRZ restrictions
4. Confirm your launch site is not within or adjacent to any MOD property
5. Check for active NOTAMs that may impose temporary restrictions
6. If near Langstone Harbour or Farlington Marshes, check for wildlife restrictions
7. Assess crowd density at Southsea seafront before flying
8. Fly below 120 metres, in daylight, within visual line of sight