Wreck
down to 50 m
City of Westminster (Runnel Stone)
A 1923 wreck on the Runnel Stone off Land's End, plastered with miniature plumose anemones and home to huge ballan wrasse.
- Experienced
- Conger eel
Open Water≤18 m
Glen Strathallan
Dive site in Plymouth & South Cornwall, United Kingdom
A ship deliberately sunk for divers, now a 15 m debris field around an upright boiler with cuttlefish, tompot blennies and octopus.
- Usual dive
- 15 m
- Deepest point
- 18 m
- Level
- Open Water
- Best months
- Jul–Oct
- Entry
- By boat
- Current
- Mild
The story
Launched in 1928, the Glen Strathallan was scuttled in Plymouth Sound on 27 April 1970, making her the first ship in Britain sunk especially for divers as an artificial reef, 34 years before HMS Scylla.
Source: shipsproject.org
The dive
A wreck and artificial reef dive from a boat. Known for cuttlefish, nudibranchs and octopus.
Who it's for
Open Water≤18 mSource: divesitedirectory.co.uk
Recommended minimum: Open Water (PADI Open Water, CMAS/FFESSM N1).
Conditions
- Dive type
- Wreck, Artificial reef
- Environment
- Open water
- Water
- Sea water
What you might see
- Cuttlefish
- Nudibranchs
- Octopus
Season in Plymouth & South Cornwall
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
- Best
- Good
- Possible
- Closed
- Not documented yet
Best months: Jul–Oct.
Source: blog.padi.comWhere is Plymouth & South Cornwall?
The point shows the Plymouth & South Cornwall area, not the exact dive site.
More dives in Plymouth & South Cornwall
Wreck
down to 30 m
HMT Elk
A small 1902 trawler sunk in 30 m, compact enough to swim around twice, with congers and lobsters in the wreckage.
- Advanced
- Conger eel
Kelp forest
down to 20 m
Porthkerris Cove
A beach dive on the Lizard where gullies and kelp shelter anemones, urchins, cuttlefish and occasionally John Dory.
- Open Water
- Basking sharks
Wall
down to 40 m
Eddystone Reef
Offshore reef 19 km south of Plymouth where white shell gravel, jewel anemones and pink sea fans often meet excellent visibility.
- Advanced
Wreck
down to 24 m
HMS Scylla
A 113 m Leander-class frigate placed on the seabed in 2004 as an artificial reef, now well colonised and home to sea fans.
- Advanced
Wreck
down to 29 m
SS Mohegan (The Manacles)
The best-known and most dived wreck on the Manacles, broken among rocks covered in gorgonian fans, dead man's fingers and jewel anemones.
- Advanced
About this page
Values marked “Estimated” come from our original catalogue and are being checked against published sources one by one. Sourced values link to where they come from. Conditions change with the season, the weather and the tide: confirm with a local dive centre before you dive.