Jazmin Carlin beats Jackson and Adlington in Swansea
British Gas Great Britain v Germany Venue: Wales National Pool, Swansea Date: 20-21 February
Carlin (left) surprised Adlington (second right) and Jackson (right)
Jazmin Carlin stunned her British team-mates Rebecca Adlington and Jo Jackson to win the women's 400m freestyle race in the meet against Germany in Swansea.
The 19-year-old clocked four minutes 06.41 seconds to edge world silver medallist Jackson into second, while Olympic champion Adlington was third.
Meanwhile, world champion Liam Tancock set the fastest time of the year as he triumphed in the men's 50m backstroke.
And wins for Fran Halsall and Lizzie Simmonds ensured Britain lead 102-56.
The 19-year-old Simmonds gave the hosts the perfect start at the Wales National Pool with victory in the women's 50m and 200m backstroke, with team-mate Georgia Davies clinching second spot in the shorter race.
Tancock, 24, led from start to finish in the men's 50m to clock 24.92, lowering his own season's and world's best time, set in Sheffield last week, by 0.09, while Matt Clay finished second.
I was expecting her to swim fast but not that fast
Bud McAllister, Carlin's coach
But the biggest surprise from day one of the two-day meet was the superb performance of Swindon-born Carlin, 19, in the women's 400m freestyle.
With Jackson and Adlington expected to dominate, the 19-year-old student took the lead at the halfway mark to claim an emphatic win in 4:06.41, just 0.22 outside her best set last year in a performance-enhancing suit.
Jackson touched second in a time of 4:08.64, while Adlington was further back in 4:10.17.
"I am really happy with that race," said the Swansea-based Carlin, a member of Britain's bronze medal-winning relay quartet at the World Championships in Rome last year.
"I was really nervous before the start and I told my coach about my nerves and he said to just focus on my race.
GB swimmers excited about a 'new era'
"I knew that I had to swim my own race because both Jo and Becky are such strong swimmers I had to just do my own thing and I know what I can do and my race so I just tried to even-split it and it worked.
"The home crowd helped with that race. This is my home pool and it was unusual to race in the pool but they were really behind us all the way."
Carlin's display surpassed the expectations of her coach Bud McAllister, who guided American great Janet Evans to three Olympic titles in the Seoul Games in 1988.
"I was expecting her to swim fast but not that fast," said the American. "She has been training very well. We were talking 4:08, 4:09 but she's really tough and it definitely helps to have the home crowd.
"The best thing with Janet was she had no limits. She swam fast to beat people. Jaz has that same attitude, she's a racer.
"She's got the same mentality, whatever it takes to win. You don't see that very often. I haven't felt this excited for a long time."
Despite her third-placed finish, double Beijing champion Adlington said she was satisfied with her performance.
"I'm not really a mid-season swimmer, that's probably the best mid-season swim I have done in a costume," said the 21-year-old.
"I'm never normally that good. For me that was a very good swim, I just couldn't keep up with Jaz and Jo. Overall, I was quite happy with it."
World silver medallist Fran Halsall won the women's 100m freestyle in 54.52, although her main rival, world champion Britta Steffen, was missing from the line-up after withdrawing from the race.
Aimee Wilmott led a British clean sweep in the 400m individual medley ahead of 16-year-old Anne Bochmann and Emma Smithurst, in a time of 4:44.45, while Thomas Haffield and Joe Roebuck were the top two in the men's event.
However, as expected, world record holder Paul Biedermann won the men's 100m freestyle race with a confident display.
The 23-year-old, who toppled Olympic great Michael Phelps as world champion over the distance as well as taking his world record, overtook Grant Turner on the final length to finish in a time of 49.78.
Biedermann was pushed all the way in the 400m freestyle by Briton Robbie Renwick, who faded in the final stretch to finish third behind Germany's Christian Kubusch in a time of 3:55.75 secs.
Biedermann is back in the pool on Sunday as Germany attempt to overhaul a 46-point deficit.
He lines up for the men's 200m freestyle alongside Ross Davenport, one of 18 events which climaxes with the men's 4x400m freestyle relay.
All swimmers at the event are competing in textile suits following the ban on the synthetic, performance-enhancing creations.
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