Tamaris plc announced interim figures this month for the period ended 30 September 1997. Turnover rose 117% from £7.14m to £15.47m as did operating profit pre-rent from £2.33m to £5.05m. At the pre-tax line, however, even though head office costs were little changed at just under £0.5m and net interest costs actually fell from £0.25m…