The company reiterated its independent directors have advised its shareholders to take no action on Roc's off-market offer of 0.792 Roc shares and 5c in cash for each Anzon Australia share.

Roc has entered into a merger implementation deed with London-listed Anzon Energy Limited (AEL), which owns 52% of Anzon Australia, offering AEL shareholders 1.33 Roc shares for every AEL share they hold.

The successful completion of the merger deed and the Anzon Australia takeover will create a combined company with about 47 million barrels of oil equivalent in net 2P (proven and probable) oil reserves, as well as best estimate gas and condensate resources; production of about 14,500boe per day; and market capitalisation of about $1.2 billion.

Anzon Australia has a 40% operating interest in the Basker-Manta-Gummy joint venture which produces oil from the Basker-Manta field through the Crystal Ocean FPSO.