Monday 31 March
The Australians gave up because Peter Treseder developed severe frostbite on his foot. They were picked up at 83° 59' N / 93° 55' E on 23 March. From their web site: "Frostbite has ended Tim and Peter's trek to the North Pole a little short of half way. Tim and Peter have been airlifted back to a weather station on Sredniy Island. Peter was suffering severe frostbite on his left foot."

Monday 25 March
Australians Tim Jarvis and Peter Treseder have been picked up by the Russian logisitic last week. We do not know yet why they had to give up.

Latest : Here is part of their press release :

Frostbite has ended Tim and Peter's trek to the North Pole a little short of half way.
"Tim and Peter have been airlifted back to a weather station on Sredniy Island. Peter was suffering severe frostbite on his left foot. Tim used the team's satellite phone to ring The Smith Family on Friday. He said that, while the team was disappointed not to be able to finish the trek, they were very pleased with what they had achieved.
"We set ambitious goals," Tim said. "We believe in striving for ambitious goals, not just the achievable ones."

Tuesday 19 March
Australians Tim Jarvis and Peter Treseder were delivered onto the ice on 4 March; instead of leaving from Cape Arktishevksi itself (80°16' N / 95°30' E), they were landed at 80°45' or 29' further north.
As their web site is not updated very regularly, we have scant information about this pair. On 11 March, they seem to have reached 82° 53', making a total of 123 km with 797 km still to go before reaching the pole. Average: 17.57 km per day.
Same assessment by the two men: the ice-floe is breaking up. Position on 17 March: 83° 36' N / 93° 20' /// - 26° C.