At least eight MPs including ministers George Eustice and Caroline Dinenage are set to participate in England, while two Scottish Government ministers and four Scottish MPs and four Welsh Assembly members have volunteered to join in.
Among well-known divers taking part in Newquay will be underwater cameraman Doug Allan and Channel 4’s “heavy-metal marine biologist” Tom the Blowfish Hird (both will also be speaking at DIVE 2018, the Dive Show at the NEC on 27/28 October).
Register as a volunteer here or just turn up on the day – the events are listed on the MCS website.
Meanwhile, further positive environmental news comes from the Caribbean, where popular diver-destination Grenada has taken decisive action against non-reusable plastics.
The government has introduced a Non-Biodegradable Waste Control Act that bans the importing of polystyrene foam with immediate effect and outlaws its use by April next year.
All other single-use plastics products such as bags, cutlery, cups and plates and drinking straws will be banned by February. The government says the move is designed to protect both the seas and its own citizens’ health.
Grenada has a population of 107,000 and, cruise-ship visitors apart, hosts some 80,000 tourists a year.
Its 30-plus dive-sites feature a large number of shipwrecks including the Caribbean’s biggest, the Bianca C, and a Jason deCaires Taylor Underwater Sculpture Park. The island's second annual Dive Fest, a four-day event run by the Grenada Scuba Diving Association, begins on 3 October.