Any jubilation, however, was tempered by the fact that the scandal-hit firm's shares are down almost 80% since March. In addition, the thorny question of whether Aim-listed Regal will own the Ukrainian gas assets for much longer remains unanswered, after its former chief executive Frank Timis secretly signed a call option that would allow Hong Kong-based Peak Resources to buy the assets, the only profitable part of its business, at the knockdown price of $1.50 a barrel of oil equivalent. Regal, up 1½p at 120½p, is investigating the legality of the agreement.