Mullion Island, located off the Lizard Peninsula, features a reef and kelp forest environment. Divers can access the site by boat or from the shore, with depths ranging from 10 to 19 metres and an average of 15 metres. Visibility varies between 5 and 20 metres. The site is suitable for beginners, though conditions require careful planning due to moderate currents and potential surge or swell. A thermocline may be present near the harbour. Divers should use a surface marker buoy and remain vigilant for boat traffic. Shore entries require caution due to surf and sea urchins, making protective footwear essential.

The Helford River in Cornwall offers a diverse underwater environment featuring a mix of natural reef, seagrass beds, and artificial reef structures. Divers can explore this varied terrain at depths ranging from 6 to 12 metres, with an average depth of 9 metres. The site requires boat access and is suitable for beginners, though the moderate current necessitates careful planning around slack water. Visibility typically ranges between 5 and 10 metres. Water temperatures fluctuate between 10C and 17C throughout the year, requiring appropriate thermal protection. Due to heavy seasonal boat traffic, divers must use a surface marker buoy at all times.

Porthkerris Fish Bowl is a sheltered shore dive in Cornwall, United Kingdom, featuring a gradual underwater slope that reaches depths between 2m and 18m. The site consists of a rocky reef, kelp forest, and seagrass habitat located approximately 100m from the shore. With an average depth of 7m and mild currents, it is suitable for beginners. Divers should be aware of potential hazards including boat traffic, entanglement, and surf. Visibility typically ranges from 5m to 10m. On-site facilities include parking, toilets, showers, changing rooms, a rinse station, air fills, equipment rental, a cafe, a dive shop, and boat charter services.

Prussia Cove, also known as Bessy's Cove, is a historic site in Cornwall featuring a series of rocky gullies and reef structures. This shore-entry location is suitable for beginners, offering depths ranging from 2 to 14 metres with an average of 8 metres. Conditions vary, with visibility typically between 5 and 15 metres and mild currents. Water temperatures fluctuate throughout the year, ranging from 10C in late winter to 17C in late summer. The site provides a sheltered environment for snorkelling, allowing visitors to explore the varied topography of the rocky reef and artificial reef features found within the cove.

Porthoustock is a shore and boat-accessible reef and kelp forest located on the coast of Cornwall. The site features a shallow, forgiving depth profile ranging from 5 to 10 metres, with an average depth of 8 metres. Visibility typically spans 5 to 10 metres. The kelp canopy provides an atmospheric environment, though divers should secure hoses and gauges to avoid entanglement. Conditions are generally mild, making this a suitable location for beginners to build confidence. Divers should remain aware of boat traffic when surfacing and exercise caution regarding the shore break. Night diving is permitted at this site, and facilities including parking and toilets are available nearby.

Porthkerris Beach on the Lizard Peninsula offers a versatile shore-entry site featuring a mix of reef, drift, and kelp forest environments. Suitable for beginners, the site ranges from 3 to 20 metres in depth, with an average of 15 metres. Visibility is variable, typically between 3 and 15 metres. Divers should be prepared for moderate currents and cold water temperatures ranging from 10 to 16C. Facilities at the site include a dive shop, equipment rental, air fills, and guided tours. Hazards include sea urchins in shallow areas and potential entanglement in kelp. A drysuit or thick wetsuit is recommended for all dives.

Drawna Rocks at Porthkerris Cove features rocky reefs that break the surface just offshore, providing a sheltered environment for snorkellers. This site is well-suited for beginners due to its accessible shore entry and protection from prevailing winds. Marine life observed at the site includes snails, which are very common during July and August. Divers and snorkellers may also encounter uncommon species such as common octopus, wrasses, orange-clubbed nudibranchs, and sea stars. Rarer sightings include soft coral, rock crabs, spiny spider crabs, triplefins, and sea cucumbers. Water temperatures at this location range from 10C in the winter months to 17C during the summer.

Vase Rock is a challenging reef and pinnacle site located 1000 metres off the coast of Cornwall. The topography features a wall structure that descends from 10 metres to a maximum depth of 42 metres, with an average depth of 20 metres. This site is strictly for advanced divers due to strong currents, surge, and variable visibility ranging from 4 to 10 metres. Boat access is required to reach the location, where dives typically last 45 minutes. Divers should be prepared for deep conditions and potential entanglement hazards. Water temperatures fluctuate between 10C and 14C throughout the year.