- Part 3: For the preceding part double click ID:nRSL2481Hb
44.6 - 0.2 44.8
Impairment of property plant and equipment - - - -
Profit (loss) before tax 1 437.7 (92.0) (12.4) 333.3
Tax charge 229.0 - 0.2 229.2
1Unallocated amounts included in profit before tax comprise corporate costs not attributable to an operating segment, investment revenue, other gains and losses and finance costs.
2Costs associated with the Africa segment are capitalised in accordance with the Group's accounting policy to the extent they are recoverable.
The accounting policies of the reportable segments are the same as the Group's accounting policies as described in Note 2.
Included in revenues arising from South East Asia are revenues of $234.5 million and $194.4 million (2013 - South East Asia $240.3 million, $102.2million, $64.9million) which arose from the Group's largest individual customers who have contributed 10% or more to the Group's revenue.
Geographical information
Group revenue and non-current assets (excluding the financial asset and other receivables) by geographical location are separately detailed below where they exceed 10% of total revenue or non-current assets, respectively:
Revenue
All of the Group's revenue is derived from foreign countries. The Group's revenue by geographical location is determined by reference to the final destination of oil or gas sold.
2014 2013
$ million $ million
Vietnam 240.0 74.7
China 97.8 86.0
Australia 48.1 137.5
Malaysia 35.5 146.9
Other 26.8 163.0
448.2 608.1
Non-current assets
2014 2013
$ million $ million
United Kingdom 1.0 0.9
Vietnam 789.0 800.6
Congo 147.1 116.7
Other - Africa 62.0 98.8
999.1 1,017.0
5 Tax
2014 2013
$ million $ million
Current tax 122.7 158.3
Deferred tax 16.0 70.9
138.7 229.2
The Group's corporation tax is calculated at 50% (2013 - 50%) of the estimated assessable profit for the year in Vietnam. During 2014 and 2013 both current and deferred taxation have arisen in overseas jurisdictions only.
The charge for the year can be reconciled to the profit per the income statement as follows:
2014 2013
$ million $ million
Profit before tax 152.7 333.3
Profit before tax at 50% (2013 - 50%) 76.4 166.7
Effects of:
Non-taxable income and non-deductible expenses 18.1 11.0
Tax losses not recognised 3.9 5.6
Non-deductible exploration costs written off 39.7 46.0
Adjustments to tax charge in respect of previous years 0.6 (0.1)
Tax charge for the year 138.7 229.2
The prevailing tax rate in the jurisdictions in which the Group produces oil and gas is 50%. The tax charge in future periods may also be affected by the factors in the reconciliation above.
6 Earnings per share
The calculation of the basic and diluted earnings per share is based on the following data:
2014 2013
$ million $ million
Earnings for the purposes of basic and diluted earnings per share 14.0 104.1