Live news stream
Gardeners are busy adding the finishing touches to their creations for this year's Chelsea Flower Show which celebrates its 100th anniversary.
There are more than 550 exhibitors, including this one below from Welcome To Yorkshire, at the event which opens on Thursday.
The garden, was inspired by Yorkshire's successful bid to host the 2013 Grand Depart of the Tour de France. It promotes the landscape that the world's best cyclists will ride through in the event next year. The garden was designed by Alistair Baldwin from Bedale.
The Prime Minister said: "This is a momentous day, not just for Tim Peake but for Great Britain.
"It is a great sign of our thriving British space sector, which has seen real growth thanks to our world-class research, and now supports nearly 30,000 jobs.
"What an achievement that Tim was picked for this historic role from over 8,000 applicants from around the world.
"I am sure he will do us proud and I hope that he will inspire the next generation to pursue exciting careers in science and engineering."
The Coalition's Marriage (Same Sex Couples) Bill will be debated over two days, with its third reading - the final hurdle in the Commons - tomorrow.
The second reading of the bill in early February saw the threat of a Conservative backbench rebellion comfortably overwhelmed with 400 MPs giving the motion a majority of 225.
Just 127 Conservatives endorsed the proposals at second reading in the Commons.
The smooth progress of the bill at third reading is less assured, though, thanks to Conservative MP's Tim Loughton's proposed amendment to the bill to allow heterosexuals to have the same right to civil partnerships as gay couples.
His suggested measure is attracting support from supporters of equal marriage as well as those who want to stop the legislation.
Labour's frontbench team is set to support Mr Loughton's amendment, giving it a real prospect of success in a free vote.
Britain's first official astronaut Major Tim Peake said he would tweet from space like Chris Hadfield had done in a bid to "try and inspire a generation."
He added that he was "delighted" after being chosen to travel to space.
Gardeners from across the Midlands are getting ready for this year's Chelsea Flower Show as it celebrates its 100th anniversary.
The Queen will be taking a tour of the displays in London, before it opens to the public on Thursday.
For one year only, gnomes will be allowed to feature in gardens and gnomes painted by celebrities are going up for auction.
Rod Stewart has topped the album chart for the first time in 34 years with his new album.
The singer said he was delighted to return to the top of the charts with his record called Time.
"I'm over the moon, absolutely over the moon. It's a long time in between but it's always worth waiting for," he said
"I've lived a wonderful life and when I was putting the book [his autobiography] together it inspired many of the songs.
"If there's anything that God gave, and some people may disagree, he gave me a tremendous vehicle in my voice."
Stewart's last number one came with Greatest Hits Volume 1 in 1979, but his last studio album to top the charts was A Night on the Town in 1976.
The 68-year-old, who has sold an estimated 150 million records worldwide, now holds the British record in terms of the longest gap between chart topping albums.
Culture Secretary Maria Miller has warned an amendment to extend civil partnerships to heterosexual couples poses "significant challenges" to the introduction of gay marriage.
The coalition's gay marriage bill returns to the Commons later with Tory MPs and activists deeply split over the issue.
Ms Miller stopped short of saying Tory former minister Tim Loughton's amendment would "wreck" the Marriage (Same Sex Couples) Bill, but warned its passing would certainly lead to delays in making gay weddings legal.
"Obviously it would be for us to go through a consultation and consideration period to understand how that would work because at the moment there really is not the detail there," Ms Miller told BBC Radio 4's Today programme.
"I believe that the majority of MPs want to see the extension of marriage that we have in our bill. They do not want to be distracted," she added.
A party of royal guests headed by the Queen will be given a sneak preview of the Chelsea Flower Show today, ahead of its public opening.
The world-famous Chelsea Flower Show marks its centenary this year, celebrating a hundred years of gardening and plants.
For one year only the RHS has lifted its ban on gnomes at RHS Chelsea Flower Show to celebrate its centenary year and raise funds for the next generation of gardeners.