ENERGY saving device manufacturer VPhase has announced half year turnover growth of 326% to £657,000 - close to 50% higher than its full year turnover in 2011, driven by its focus on the social housing sector.   Despite this progress, negotiations for a number of large contracts that the company said it would have hoped to have concluded by now have become "much more protracted than anticipated", the company said in a trading statement. As a result VPhase said it is unlikely that it will deliver the 11-fold year o......for the full story register now for free or login below...