
Bookmaker William Hill has offered odds of 25-1 on it reaching the top spot after its release on December 13.
The record faces stiff competition as in recent years the Christmas number one usually goes to the winner of a television talent contest.
If anyone could challenge "The X Factor" winner, "it may well be an artist from this background," said spokesman Gennaro Castaldo from music retailer HMV.
"We can see the beautiful '1,000 Miles Apart' as a potential dark horse for the Christmas number one."
Rawlins, who plans to leave the forces next year to pursue a career in music, is following in the footsteps of singer-songwriter James Blunt, formerly an officer who served in Kosovo.
A total of 345 British troops have been killed in Afghanistan since operations began in 2001.
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The record faces stiff competition as in recent years the Christmas number one usually goes to the winner of a television talent contest.
If anyone could challenge "The X Factor" winner, "it may well be an artist from this background," said spokesman Gennaro Castaldo from music retailer HMV.
"We can see the beautiful '1,000 Miles Apart' as a potential dark horse for the Christmas number one."
Rawlins, who plans to leave the forces next year to pursue a career in music, is following in the footsteps of singer-songwriter James Blunt, formerly an officer who served in Kosovo.
A total of 345 British troops have been killed in Afghanistan since operations began in 2001.
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