THE number of companies going insolvent rose almost 7% in the final quarter of last year, latest data shows.Within the West Midlands, firms operating in the construction and retail sectors are thought to be the ones most at risk.PwC said 5,331 companies entered insolvency in Q4, an increase of 6.9% on the same quarter of 2010 but a decrease of 1.1% compared to the previous quarter of 2011. The cumulative total insolvencies for all of 2011 were 4.2% higher than the whole of 2010. Matthew Hammond, partner in the business recovery ser......for the full story register now for free or login below...