I suppose to be strictly accurate Irish natural gas production should be mentioned. However as maximising production with modern reservoir management techniques hastens the onset of depletion, the resultant contribution is largely a flash in the pan. Hence, below!

"Until 1994 all our gas requirements were met from the Kinsale gas fields. After a period of growing dependence on imported gas we can once again meet 58% to 60% of our gas requirements from the two sources of natural gas in Ireland; Kinsale (2-4%) and Corrib (56%). Without further discoveries we will be importing up to 90% of our gas needs by 2025."