persistent rain gathers over northern ireland, scotland and northern england towards the end of the net. a much fresher night, temperatures down into the low teens. for sunday, daytime, stilla bit of rain to come across the northern half of the uk. perhaps shelter regions across the north—east of england not faring quite so badly, but some of those showers across northern scotland could be particularly heavy. a windy day across the board. gusts particular strong to the ly of high ground. there are no temperatures, 20 at best. hello, this is bbc news. the headlines: british tourists are set to be allowed to travel to european countries including spain, france and greece without having to quarantine on their return. the motion in carried and they have agreed to nominate deputy michael martin to be taoiseach. ireland swears in its new prime minister, micheal martin, as the country's two largest parties, fianna fail and fine gael, form a coalition for the first time. a man who stabbed six people at a hotel in glasgow yesterday warned others he planned to carry out the attack, the bbc understands. as texas and florida reimpose virus restrictions, the us infectious disease chief says the nation has a serious problem in its handling of covid—i9. india records its highest daily number of new coronavirus cases so far, surging to over 500,000. and now on bbc news, it's time for click. this week, it's a food special, with a groundbreaking greenhouse heated by sewage. robots that dish up your dinner, the ultimate pizza, and heston blumenthal does this. musical chime. hey, welcome to click, hope you're doing 0k. i don't know what it's like where you are but, over here, restrictions are being lifted and many, many more places are going to be able to reopen soon. which, if i'm honest, feels a bit strange. i don't know how you feel about it, lara. yeah, i think i've already adapted to some things about lockdown, although i'll be very pleased to get this fixed, and also hospitality is reopening. so it means we can go to a restaurant. ijust don't know how normal it's going to feel sitting down and eating in one. yeah, i don't think i'm ready to eat out yet, it's weird, isn't it? it is, but then i suppose it has been such a strange few months, the coronavirus has really affected pretty much everything, and the food and drinks industry is no exception. true. now, pubs are going to reopen as well, you might be looking forward to your cheeky chilled glass of wine, unless you have already been taking part in a spot of virtual wine tasting. the ciacci winery in italy is everything that you would expect from a tuscan vineyard, it is gorgeous, isn't it? now, click is always a collaborative effort, and each team member is fairly chosen to cover a story — so this week click‘s boss simon decided to delegate thisjob to himself. not bad. with trade shows cancelled and no chance to visit their distributors around the world, this traditional business has taken to microsoft teams to do what they normally do in person. we have to do the video tasting only with our distributors, because it is a new way to communicate, because without other important trade fairs, so this is a new way to communicate. i'm not saying that in the future a tradeshow will disappear, but i think they will be attended by more interested people with a very well—planned schedules. for us, for example, in our sector, there is this type of digital transformation, and we're starting to use microsoft teams, for us, it was very, very revolutionary. it even a business like a winery is thinking about going online, and so many other industries are too, then i wonder if the tech shows we go to every year will ever return in the flesh. well, booze aside, at a time like this, many of us are thinking about our health more than ever. and that can also mean thinking more about what we're consuming and where it has come from. in the uk, by some estimates, up to 80% of our food is imported. so travel restrictions and controlled borders could be a real problem unless we can produce more food ourselves. sojen copestake's been to visit a world—first project where the aim is to create more food but cause less damage to the environment. one word — sewage. yes, sewage. every year, we producei million tonnes of it in the uk. and it produces its own waste — heat. interest is growing in how to use this waste heat as a sustainable energy source, and here in east anglia it's being used in the building of a unique greenhouse project which could revolutionise our country's farming industry. this will be the world's first greenhouse that is using heat from a water treatment plant, and that has the benefit of not only reducing the impact on the environment but also reducing the uk's need to import produce. in the uk, we consume over 500,000 tonnes of fresh tomatoes every year. 80% of this, around 400,000 tonnes, is imported. self—sufficient in produce, but also reduce carbon emissions by 75%. so, ben, we're now walking into the greenhouse, blimey, it's really, really big. certainly one of the largest in terms of the uk. for every hectare of normal land, a greenhouse like this can produce ten times more food using ten times less water. we'd be looking at growing probably about 23 million peppers a year in this particular facility. so what is that as a percentage of the amount of consumption of peppers in the uk? i'd say probably 5%. a conventional greenhouse might use fossil fuels to provide its heat by burning gas or oil, but here the waste heat from the nearby sewage works is pumped 2.5 kilometres via an enclosed loop system to the greenhouse. the idea to use this waste heat came from thermal engineer neil lawson. well, it was inspiration from nature, really. walking down the river with the dog on a winter's day, saw a stream coming in from the left, and it was steaming and all the ducks were sitting there, obviously enjoying the warmth, so i followed that stream to its source, and came up to the sewage treatment works. they were discharging 1,000 litres a second of clean water into the river at up to 25 degrees centigrade. that equates to sa megawatts worth of waste heat. that's enough heating for about 15,000 homes. using geographic information system mapping, 43 sites close to wastewater centres have been identified around the country, including the anglian water treatment plant near bury st edmunds. so we're now at the water recycling plant where this treated water will then be pumped into a station and the heat will be removed from that process and then the heat will be transferred to the greenhouse. we're taking a low source of energy, which is otherwise a waste energy, using heat pumps to upgrade or compress that low—grade heat to make it useful heat to heat a greenhouse. we're taking a low source of energy, which is otherwise a waste energy, using heat pumps to upgrade or compress that low—grade heat to make it useful heat to heat a greenhouse. a greenhouse uses a lot of energy, here we have an abundant source available. another benefit to this new farming technique is reducing reliance on countries where water is no longer so abundant. parts of southern spain, actually, their groundwater now is saline. and they're having to develop saline resistant crops. whereas here in the uk, we don't have that problem, it rains all the time. we can get all the water we need from capturing it on the roof and recycling it. and that's not all the roof can do. and the entire roof is designed to maximise the amount of light that comes into it, so much so that the glass is diffuse and it enables the light to be spread evenly across the entire crop. it'll be an extremely high tech greenhouse. it's actually quite remarkable, it might look unassuming, but actually there's a lot of artificial intelligence included all the vents are controlled

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