“After the Second Battle of Krithia in May 1915, the average distance of the Allied trenches on the Helles front from the main landing places at W and V beaches was little more than three miles. Almost all the British area was overlooked by Turkish positions on the forward slopes of Achi Baba, and the British were consequently very anxious to capture these positions at the earliest possible opportunity.”
This report by Bryn Hammond (IWM) was really useful in helping me get a detailed picture of what happened. The link takes you to the main page but once you get there click on the ‘Download a fuller account….’ option.