Trading in shares of Amstrad Plc has finally been halted ahead of a court decision on the break-up of the electronics group. Ownership of its two subsidiaries Viglen Ltd and Betacom Plc will pass to existing shareholders and Amstrad itself will remain a shell to conclude litigation against Seagate Technology Inc and Western Digital Corp over allegedly faulty disk drives. Amstrad was worth 333m pounds at the suspension price of 278.5 pence. Founder Alan Sugar owns 34% of the shares.