Dai Greene and Mo Farah underlined their status as world champions of their respective disciplines in the Olympic athletics trials in Birmingham.
Greene, who recently revealed he underwent knee surgery in December, won his heat in 50.80 seconds and was joined in the final by the four other men who have achieved the 'A' standard - Nathan Woodward, Rhys Williams, Jack Green and Richard Yates. The first two across the line will seal their place in London.
The Welshman said: "It hasn't been a perfect start to the season but things are getting better. I'm still on track for peaking in the summer. Training-wise things have improved massively. I can feel myself getting better all the time. I feel like I have turned the corner."
Secure in the knowledge that he will be selected for the 5,000m and 10,000m in London, Farah opted to work on his finishing speed in the 1,500m and duly cruised to victory in his heat.
"It was good to get the legs working a bit, a bit of speed," the 29-year-old said. "I'm looking forward to it (the final) tomorrow. It's not going to be as easy as the heat but it should be good."
As for defending his European 5,000m title in Helsinki next Wednesday, Farah added: "It just depends what the coach (Alberto Salazar) says. I don't even know what's going on. I haven't decided whether I'm going to do it or not. It all depends on this weekend."