At 160km on the bike 2012 champion Ambrose is 2.50 ahead of Bell with Baldwin 5.55 back.
According to our spotter Toby Coote Ambrose looks the best of the top three men.
In 2012 Ambrose ran a 2:57 marathon to win IRONMAN Australia, in 2013 Bell ran a 2:53, those two look to be the form runners at the pointy end of the field. The 2015 title looks like it will come down to who has the freshest run legs.
At 146km on the bike Marangon has extended her lead to 3.24 over Jess Fleming who is in second place, Bremer is now in third a further 15 seconds behind.
Ambrose is off the bike, and onto the run.
Top three are on the run, Ambrose with a 6.49 lead over Bell with Baldwin in third over 9 minutes off the lead.
Ambrose is still leading at the 5km mark and according to our spotter Toby Coote is moving well. His lead is 7.20 to Bell in 2nd and Baldwin a further minute back in third. According to Coote Bell looks the most comfortable.
TOP 10 MALE PROS OFF THE BIKE
1 Paul AMBROSE (#2) 5:28:57
2 Luke BELL (#3) 5:36:02 +07:04
3 Nick BALDWIN (#5) 5:37:19 +08:21
4 Brian FULLER (#13) 5:40:36 +11:38
5 Pete JACOBS (#1) 5:44:27 +15:29
6 Graham O'GRADY (#8) 5:45:59 +17:02
7 Luke MARTIN (#16) 5:46:56 +17:58
8 Matt BURTON (#7) 5:51:13 +22:15
9 Dan MCGUIGAN (#17) 5:53:19 +24:21
10 Peter ROBERTSON (#4) 5:56:15 +27:17
After a tough day Robbo has just withdrawn from the race.
At the 9km mark Ambrose's lead was down from 7.22 over Bell to 6.50. The man on the move looks to be Fuller who has moved into 5th.
Jess Fleming has almost erased Marangon's lead, she's now 45 seconds behind just over 1km into the run.
LEADING FEMALE PROS OFF THE BIKE
1 Lisa MARANGON AUS 6:07:47
2 Jessica FLEMING AUS 6:10:24 2:36
3 Christie SYM AUS 6:12:00 4:12
4 Michelle BREMER NZL 6:13:17 5:30
5 Jessica RICHARDS AUS 6:19:51 12:04
6 Marie SORRELL AUS 6:23:02 15:15
We have a change in the women's lead Jess Fleming is our new leader. Our spotter reports that and I quote "Lisa looks in a world of hurt."
At 14km Ambrose is 6.50 ahead of Bell, Fuller is in third 10 mins off the lead.
Christie Sym is now in second 35 seconds behind Fleming and Marangon in 3rd some 55 seconds back.
At the half way mark of the run Bell's patience looks to be paying off as he is continuing to chip away at Ambrose's lead. The lead is now down to 5 mins. Toby Coote reports that both athletes are running at a stride rate of 87 strides per 60 seconds, with Bell looking the most comfortable.
At the 25km mark Ambrose's lead is down to 3.26 over Bell. Two former champs chasng their second IRONMAN Australia title.
At the 27km mark Bell is just 2.52 behind Ambrose. He's taking almost 30 seconds out of the lead every 1.5kms.
Kiwi Michelle Bremer is closing in on first place, at half way she was just 17 seconds behind Fleming.
The pass has been made, Michelle Bremer is now in the lead. Fleming 2nd, and Gailey 3rd.
It doesn't get much closer than this - it's a 2 man race at the 38km mark with just one minute between Paul Ambrose in 1st & Luke Bell in 2nd.
Chasing our men's leaders are Brian Fuller (+12.43), Nick Baldwin (+18.29) and Luke Martin (+19.37)
Paul Ambrose has held on and is our 2015 Toyota IRONMAN Australia Champion in a time of 8:35:52!
At the 31km mark in the women's race Michelle Bremer has extended her lead out and is 1 min 44 secs ahead of Jess Fleming
Rounding out the Top 3 with 10k to go in the women's race is Michelle Gailey - 10 mins behind race leader Michelle Bremer.