(ShareCast News) - The non-executive chairman of Rotala sold 245,256 shares in the transport company, just a day after it posted a drop in first half profits.John Gunn sold the shares for an individual price of 68.5p, bringing home a total of 168,000 in the transaction.He now holds 6.12m shares, representing a 16.06% stake in the company.On Monday, Rotala posted pre-tax profit of £894,000, down by almost 10% year-on-year.The company said in a statement it was confident a new bus bill which would give elected mayors the power to franchise services would only be to Rotala's benefit.