Gusbourne, which makes sparkling wine, said on Thursday that it plans to raise £3.57m through an open offer of 7.1m shares at 50p each, with a basic entitlement of two new shares for every five existing shares.The company said that its controlling shareholder Lord Ashcroft will participate in the open offer to maintain his beneficial interest at 64.4% of the enlarged share capital following admission.It added that all directors intend to take up their respective entitlements in full.Gusbourne also said that current trading is in line with expectations and development plans remain on course.