The old and gold urdu book "Ilm un Nahw" was recently translated into English by Madrassah Zakariyya . S.Africa. It a nice concize information for Nahw.
Another good book I came across and actually studied the 1st volume is Arabic Tutor Vol 1-4.. This is english translation by Ml. Ebrahim Mohammed of the urdu book "Arbi Ka Muallim" which is also in 4 parts. It covers all the aspects of Sarf and Nahw.
Regarding Sarf, there is a new english translation of Safwatul Masaadir. This should be nice book for beginers too.