Aerospace and avionics software house and bodyshopper Marcol Group Plc is adding a fourth arm to its business with the acquisition of the goodwill and certain assets of Helix Software Consultants Ltd, a City of London-based financial systems consultancy, for approximately UKP550,000 – 348,519 shares, currently 58p each, and UKP350,000 in cash: in the year to June 30 1987, Helix suffered a pre-tax loss of UKP27,000; four of its senior managers are buying a 20% stake in Helix for UKP110,000: they will be able to exchange their shares for those in Marcol Group in 1991, the exact number depending on Helix’s performance in the intervening period.