Laura Muir won the 800m title at the British Championships and said she will enter the event and the 1500m at the European Championships in Berlin.
The 25-year-old Scot clocked a time of two minutes 01.22 seconds.
Shelayna Oskan-Clarke claimed second in 2:01.94 after a battle with Adelle Tracey (2:02.00) who finished in third.
“At the moment we asked the selectors to enter me into both events. It’s still a long way off but I’ve asked to be in the two,” Muir told BBC Sport.
“Training has been going really well. I have got a few hard races lined up before then so I am hoping to run some fast times.
“I am happy I came out and did the job I wanted to do today. I’ve never won an 800m title outdoors so I am delighted with that.”
Tracey had led after the first lap but Muir, who took World Indoors silver in the 1500m in March, signalled her intent at the bell as she confidently moved through the field to take the lead.
With 300m to go, Muir left the rest of the field in her wake and despite fading slightly in the home stretch, enjoyed a comfortable margin of victory.
Muir’s compatriot Lynsey Sharp could only finish fifth in a time of 2:02.38.
Former British Olympic middle-distance runner Steve Cram
It threw the cat among the pigeons when Laura Muir turned up to run the 800m as most people expected her to run the 1500m here.
These were Great Britain’s best 800m runners and they couldn’t live with Muir in this race.
She had to fight a little bit at the end and it wasn’t her quickest final 100m. However, she had done the damage well before that and had completely blown the rest away.
It will be interesting at the European Championships because both the 800m and 1500m are on the same day so she would have to run twice in a day.
Dobbin breaks PB twice in one day
Muir’s fellow Scot Beth Dobbin surged through to take the women’s 200m title and set a new personal best for a second time on Sunday.
Dobbin, who lowered her own Scottish record when winning her heat in 22.75 seconds, took another 16-hundredths of a second off it in the final to win in a new championship record of 22.59, pipping Bianca Williams (22.60), Jodie Williams and Shannon Hylton (both 22.78).
“I can’t even explain how much this means. It has been such a stressful week,” Dobbin told BBC Sport.
“I knew if I ran a good race I could do it. I believed in myself but just to do it is crazy. It is overwhelming. I am just so pleased.”
Nethaneel Mitchell-Blake pipped Adam Gemili to win the men’s 200m in a championship record of 20.24 secs, Gemili clocking 20.26 to also book his place at the Europeans.
Greene holds on to win 400m hurdles
Former world champion Dai Greene won the men’s 400m hurdles as he looks to put recent injury problems behind him.
Greene ran a confident race in 50.06 seconds and just had enough left to see off the late challenges of Jack Green (50.13) and Sebastian Rodger (50.18)
The 32-year-old Welshman was forced to pull out of the 2018 Commonwealth Games in April with a torn hamstring.
“I was technically terrible in the home straight so I was glad to get over the line,” Greene told BBC Sport.
“It was about trying to hold it together after coming back and I’m relieved to have qualification for the European Championships in Berlin sorted.”
One of the performances of the day came in the women’s long jump, where Lorraine Ugen jumped a championship-record 7.05m to take victory from Jazmin Sawyers, who set a personal best of 6.86m in second.
Chris O’Hare led home a Scottish 1-2-3 in the men’s 1500m, holding on to win in 3:46.72 ahead of Jake Wightman (3:46.86) and the fast-finishing Neil Gourley (3:46.87).
Steph Twell won her fifth British title in the women’s 5,000m, holding off Melissa Courtney in second and Eilish McColgan in third.
Rosie Clarke was victorious in the the women’s 3,000m steeplechase as she clocked nine minutes 45.83 seconds to also secure her place in Berlin.
Meghan Beesley clocked 55.73 seconds to win the women’s 400m hurdles while Elliot Giles won the men’s 800m in one minute 50.28.
Andrew Pozzi regained his British title in the 110m hurdles with a time of 13.61 seconds.
Elsewhere, Jade Lally won the women’s discus with a throw of 56.81, Laura Whittingham won the women’s javelin with a season’s best throw of 55.55m while Sophie Hitchon won the women’s hammer with a championship record throw of 72.02.
Charlie Myers won the men’s pole vault with a personal best of 5.55m with Tim Duckworth won the men’s long jump with a leap of exactly eight metres
Tom Bosworth and Bethan Davies won the men’s and women’s 5,000m walk respectively.