By Jamie Spencer Arsenal defender Jurrien Timber has taken his next steps in his ongoing recovery from an ACL injury suffered on his Premier League debut back in August. Timber lasted just 50 minutes of his league bow for the Gunners following an initial £34m transfer from Ajax that catapulted him into the top ten of the most expensive Dutch players in history. It has been more than six months since then, but football.london carried a positive update on Thursday with news that Timber has progressed beyond individual rehab to join in with some aspects of group training. However, the 22-year-old…