After making her county debut for Somerset at the age of 13, Davies quickly progressed into the England development and youth sides.

[4] Davies progressed quickly into the England development squad, representing them in a 2002 match against British Universities Sports Association.

[6] In 2002, she made her first appearance in the Super Fours—a competition in which the England selectors place the 48 leading players into four teams—playing one match for the Knight Riders.

[12] Despite this move she remained in the lower order on her next international appearance, a 50-over contest for the England development squad which served as a warm-up for the touring South Africa national women's cricket team.

[13] Twenty20 cricket was introduced into the English women's domestic game for the first time in 2004 as part of the Super Fours competition.

Playing her first match of this format, Davies took four wickets for Braves, helping them to a 12 run victory in the semi-final of the competition.

Upon the conclusion of the English domestic season, Davies travelled to Ireland as part of the England squad to compete in the 2004 Women's European Under-21 Championships.

[6] Davies played two different roles for England during the tournament; in the first match she was used purely as an opening batsman, scoring 25 runs off 27 balls to help chase down a small Scotland total of 57 in under 10 overs.

[23] The highlight of her bowling came in the match against Scotland, when Davies collected four wickets in 6.2 overs, conceding just five runs during this time.

[25] Davies performed well for England A during a match against the touring Indian side, restricting the visitors to just fifteen runs off her ten overs, taking two wickets as she did so.

[35] She bowled six wicket-less overs in this match, and was not required to bat as England chased down the hosts total for the loss of only one wicket.

[37] She added one more wicket the fourth ODI, but there was no result as the match was washed out, leaving Davies without a batting innings during the series.

[22] Davies was named Somerset captain for the 2009 season, taking over from Hannah Lloyd, who continued to play for the side.

In her first match as captain—against Surrey on 10 May 2009—she scored a half-century, and shared a 128-run partnership with fellow opener Sophie Le Marchand, helping her side to a 21 run victory.

[6] She continued as captain in 2010, and in Somerset's opening fixture of the season, against Berkshire, she claimed her fourth List A four-wicket haul.