At the Autumn Statement, the chancellor announced interim conclusions following the consultation on the oil and gas fiscal regime. Taking immediate effect is a reduction in the rate for supplementary charge to 30%, a cluster area allowance for high pressure, high temperature projects and an extension to the number of years that ring fence expenditure supplement can be claimed from six to ten. The newly formed Oil and Gas Authority is being asked to look into further changes, including an overhaul of field allowances with an investment allowance, exploration incentives and a review of the tax treatment of infrastructure and decommissioning.