Secure communications specialist Vislink has posted its interim results for the six months ended 30 June, showing that underlying orders received in the period grew 19 per cent to £23.7m. Vislink said that it was cautiously optimistic that the second half of 2011 will show a further strong improvement in trading. However underlying revenue was six per cent lower than last year at £19.1m. Total underlying costs fell by 19 per cent to £12m. In June Vislink acquired Essex based wireless camera manufacturer Gigawave in a deal worth £3.75m.