AIM-listed Wren Homes has posted a pre-tax loss of £393,970 for the first half to January 31, following a drop in sales resulting from the market downturn. During the same period in 2007 is made a £245,504 profit. The retirement and “extra care” homebuilder turned over £84,000 during the six months, compared to £477,485 during the same period last year. …