The pioneering designer and activist has been making waves for decades. Now she’s back with an urgent message – and this time she won’t take no for an answer…

Katharine Hamnett has been plotting. On the cracked, peeling screen of her battered iPhone, she’s scrolling through what she hopes to be the blueprint for, come polling day, a ballot box-based revolution. It’s a PDF with an array of mocked-up billboards, each emblazoned with a policy or slogan. A designer and campaigner renowned for her political punchiness, she has made the text snappy and succinct, all in trademark capital letters. “In here is everything that’s missing,” she laments, “from this so-far awful election. Both main parties want us to feel like progressive ideas are in the bin. Forgotten. We mustn’t let them.”

She reels off a selection: “Vote freedom to protest; vote free education; vote save the NHS; vote let aid into Gaza now.” There are plenty more. “Vote legalise, nationalise and tax marijuana; vote help refugees; vote ceasefire; vote good, free public regional transport; vote roller-discos.” Yes, roller-discos. “I did some research while working with Podemos in Spain. They foster community and solidarity. Isn’t that fun?” Another, her overarching mantra: “Our vote is the most powerful tool to get the world we want. I want that one all over.”

Campaigners find PFAS, which can contaminate the soil and water supply, in more than 80% of 27 companies’ products

Hikers may be inadvertently damaging the environment and risking their own health by wearing clothes made waterproof with “ forever chemicals ”, according to research by Ethical Consumer .

The campaigning magazine examined 27 companies that make outdoor clothing such as fleeces, waterproof jackets, walking boots and rucksacks, and found 82% were still using per- and polyfluoroalkyl substances, or PFAS .

Juneau agrees deal with industry body to curtail visits but critics say it does not go far enough to protect quality of life

Alaska’s capital city is to limit the numbers of cruise ship passengers arriving at the port amid concerns over tourism’s growing impact, but a leading critic of the industry has said further measures to protect Alaskans’ quality of life are needed.

Located on the Gastineau Channel in southern Alaska, Juneau has a population of 32,000 and last year received a record 1.65 million cruise ship passengers – a 23% increase from the previous high.

Add lemon juice and a bit of garlic to the near-empty jar of tahini and shake for a superb dressing – it’s lovely on this Palestinian cooked salad

Tahini, or tahinia , is an intense, rich sauce made from pounded sesame seeds that features very prominently in my friend Fadi Kattan ’s new book, Bethlehem: A Celebration of Palestinian Food , in which there are recipes for, among others, tahinia shortbread and an aubergine and braised chard salad that inspired this week’s recipe.

One of my favourite new kitchen tricks is to make sauces and dressings from the remnants of jars. Most things packed in a jar stick stubbornly to the sides and bottom, unwilling to be budged, but with a little ingenuity they can be turned into something new, valuable and delicious, and in the process leave the compost bin empty and/or the drain clear. Tahini is particularly obstinate, and often sticks like concrete to the bottom of its jar or pot. Add a little lemon juice, however, and give it a shake to “wash” the insides, and you have the makings of an easy and tasty dressing for salad, or to serve with grilled vegetables or braised chard.

Discover this recipe and many more from your favourite cooks in the new Guardian Feast app , with smart features to make everyday cooking easier and more fun

A look at how Labour, the Conservatives, Lib Dems, Greens and Plaid Cymru compare on key issues

• UK general election live – latest updates

Of the big parties contesting the election outside Northern Ireland, all but the Scottish National party and Reform UK have now released their manifestos. So what is on offer thus far to voters on 4 July?

Laxey Bay, Isle of Man: This protected marine area is doing better than most, but there remains one rather foul problem to address

On the east coast of the Isle of Man there exists an extraordinary little bay that supports a wealth of wildlife. Today, flowering thrift bobs among the breeding gulls and a gannet plunges in the bay, gathering food for a chick that is, almost unbelievably, in Scotland. I have seen 99 different species of bird here; eiders now breed, joining black guillemots, choughs, oystercatchers and peregrines. We have nesting gulls that winter in Africa (who would have thought?), replaced each year by a pod of bottlenosed dolphins who migrate up from Wales. Under the waves, an eelgrass meadow is recovering after bottom trawling was banned in 2009. The sandy bottom is home to spectacular small-spotted cat sharks as well as the venerable ocean quahog, a type of edible clam that can live to 500 years old, and one of the rarer species in all Britain and Ireland.

Laxey Bay was designated a strict marine nature reserve in 2018, forming part of the Isle of Man’s international commitment to protect 30% of our seas by 2030. Few of those paddling its cold waters will be aware that they’re actually in a nature reserve – they don’t usually come with ice‑cream shops. For a marine area to be officially “protected” is no guarantee that it is safe from harm ; destructive fishing practices still take place in such areas around the UK. But here the designation works: even potting and anchoring are banned in places. And the results speak for themselves – on the first day of the annual scallop season, there’s a race to be the first to fish right up to the reserve boundary. Protecting bays like this results in larger and more abundant shellfish outside them.

Fear of being seen as unclean drives overwashing of clothes at expense of environment, Swedish scientists say

How often should you wash your clothes? Doctors don’t really know, but the decision is more cultural than medical, anyway. Worried about leaving the house in sweaty shirts or stained shorts, people often chuck clean clothes in the laundry basket after wearing them just once.

But the urge to avoid whiffy garments carries a climate cost that has largely been ignored. New research shows that feelings of disgust and shame encourage excessive clothes washing even among those who care about their carbon footprint.

Makah people, whose right to hunt whales is noted in treaty, granted waiver by US government to kill two or three a year

The United States granted the Makah Native American Tribe in Washington state a long-sought waiver on Thursday that helps clear the way for its first sanctioned whale hunts since 1999.

The Makah, a tribe of 1,500 people on the north-western tip of the Olympic Peninsula, is the only Native American tribe with a treaty that specifically mentions a right to hunt whales. But it has faced more than two decades of court challenges, bureaucratic hearings and scientific review as it seeks to resume hunting for gray whales.

Many people fear the UK’s draughty old properties are too great a challenge for the technology

• Can heat pumps be installed in older properties?
• Do heat pumps work at freezing temperatures?
• Are heat pumps more expensive to run than gas boilers?

Heat pumps could be the single largest step a household can take to reduce their carbon emissions while saving money on their bills. But many in Britain fear that, even though millions of homes across Europe have benefited from the shift away from gas or oil boilers, the UK’s draughty old homes could prove too great a challenge for the technology.

The concern is unsurprising given that the UK has some of the least energy efficient homes in Europe. A study by the smart home company tado° monitored 80,000 users across Europe to find how quickly properties lose heat when outdoor temperatures fall to zero. It found that UK homes lost on average 3C after five hours without heating, compared with just 1C in Germany and 0.9C in Norway.