He moved again for the 2007 season to Milnrow,[3] following career advice to gain experience as a nominated club professional.
[9] The next year, he made his list a (one-day) debut; playing against Worcestershire on 22 April 2007, he came in at the fall of Lancashire's first wicket and was dismissed for one run.
[11] Struggling to force his way into Lancashire's batting line-up in 2009 – made up of the likes of Tom Smith, Paul Horton, Mal Loye, Mark Chilton, V V S Laxman, and Francois du Plessis[12] – Brown was a regular in the top order of Lancashire's second team which progressed to the final of the Second XI Championship and the semi-final of the Second XI Trophy.
[9][11] In the last innings of England's 2010 Test series against Bangladesh he took a catch standing at wide mid-off claiming the wicket of Mushfiqur Rahim off Steven Finn's bowling, one of many substitute fielding appearances that day.
[14] After scoring 56 for Lancashire's first team against West Indies A in a 50-over friendly,[15] Brown make his first 40-over appearance of the season in a Clydesdale Bank 40 group tie against the Unicorns.
[16] In the seven one-day matches Brown played in the 2010 season, he scored 286 runs at an average of 47.66, including his first three half-centuries in the format.