HC Deb 06 June 1978 vol 951 cc113-8W
Mr. Goodlad

asked the Chancellor of the Exchequer what will be the cost to the Exchequer resulting from an adverse movement of (a) 5 per cent. and (b) 10 per cent. in the £ sterling-dollar exchange rate on repayment of borrowings by the Government and each of the nationalised industries in each of the next 10 years.

Mr. Robert Sheldon

The table below shows figures for the repayment of overseas borrowing by the Government and individual nationalised industries from 1978 to 1987. The figures in the first line for each borrower have been converted to pounds at current exchange rates; those in the second assume a 5 per cent. depreciation of sterling against all other currencies; those in the third assume a 10 per cent. depreciation of sterling. The figures take account of all overseas borrowing up to 31st March 1978. They also take account of all early repayments carried out to date.

The method of calculating the figures necessarily involved some rather artificial assumptions. For instance, where a depreciation of the pound against the dollar is assumed, it is necessary to make some assumption about the value of other currencies' rates against the dollar. In this calculation the assumption made is that other currencies' dollar rates re- main unchanged so that sterling depreciates equally against them all. Similarly, it is necessary to make an assumption about the timing of the depreciation of the pound. It has been assumed to happen instantaneously. Neither of these assumptions is likely to match any actual developments.

Comparison of the three lines for each borrower shows the difference between the sterling value of debt to be repaid over the next 10 years at current rates and the sterling value, assuming depreciation of the pound. This difference cannot, however, be directly related to any cost to the Exchequer of such depreciation, for several reasons. First, in the case of borrowing by Her Majesty's Government, the foreign currency proceeds are taken into the reserves without being converted into sterling, and, assuming they are retained in the reserves until repaid, there will be no cost to the EEA if sterling depreciates. To this extent, the difference in value after depreciation is merely a book value change.

Second, in the case of nationalised industries, around four-fifths of their total outstanding overseas borrowing was drawn under the exchange cover scheme. Under this scheme the exchange equalisation account (EEA) guarantees the nationalised industry foreign currency for payments on overseas loans at a fixed exchange rate. The sterling liability of the nationalised industry is therefore fixed, and the EEA bears any additional cost or benefit deriving from exchange rate movements. However, any such cost may be wholly or partly offset by the charge paid by the industry to the EEA for the use of the scheme for each loan. It is not practicable to calculate the cost or benefit to the EEA resulting from the operation of the exchange cover scheme for each loan; to do so would require arbitrary assumptions about the use of the foreign currency proceeds accruing to the EEA from loans, and about interest payments which it might receive from investment of the proceeds.

Third, in the case of nationalised industry borrowing not covered by the exchange cover scheme, the industry bears the additional sterling cost deriving from a depreciation of the pound. The cost to the Exchequer will depend on the individual industry's financial relations with the Government.

REPAYMENT SCHEDULE OF OVERSEAS DEBT 1978–87
£ million
1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 Total
Her Majesty's Government:
Current rates 617 413 767 1,325 1,163 735 890 71 72 83 6,136
5 per cent. £ depreciation 653 427 803 1,365 1,183 737 937 75 76 88 6,344
10 per cent. £ depreciation 669 443 844 1,410 1,205 739 989 79 80 93 6,551
Nationalised industries:
Electricity Council:
Current rates 401 150 245 384 238 165 49 22 23 16 1,693
5 per cent. £ depreciation 422 158 258 404 250 174 52 23 23 16 1,780
10 per cent. £ depreciation 445 167 273 427 264 183 55 24 24 17 1,879
South of Scotland Electricity Board:
Current rates 26 61 8 50 9 9 7 7 8 5 188
5 per cent. £ depreciation 27 64 8 52 9 10 7 7 8 5 198
10 per cent. £ depreciation 28 67 9 55 10 10 8 8 9 5 208
North of Scotland Hydro-Electric Board:
Current rates 1 2 107 4 54 4 2 1 1 1 176
5 per cent. £ depreciation 1 2 113 4 54 5 2 1 1 1 183
10 per cent. £ depreciation 1 2 119 4 54 5 2 1 1 1 190
British Gas Corporation:
Current rates 177 133 72 59 51 18 16 15 2 542
5 per cent. £ depreciation 186 140 75 62 54 18 17 15 2 570
10 per cent. £ depreciation 196 147 79 66 57 19 18 16 2 602
British Steel Corporation:
Current rates 3 27 102 92 110 142 207 33 48 23 787
5 per cent. £ depreciation 4 29 107 96 116 150 218 34 50 24 828
10 per cent. £ depreciation 4 30 113 102 122 158 230 36 53 25 872
British Airways:
Current rates 18 58 9 18 11 12 10 9 7 6 157
5 per cent. £ depreciation 19 61 9 19 12 13 11 9 7 7 166
10 per cent. £ depreciation 20 64 10 20 13 13 11 10 8 7 175
British National Oil Corporation:
Current rates 53 106 106 106 53 423
5 per cent. £ depreciation 56 111 111 111 56 446
10 per cent. £ depreciation 59 118 118 118 59 470

£ million
1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 Total
Post Office:
Current rates 125 170 137 312 75 15 16 18 26 2 895
5 per cent. £ depreciation 131 179 144 328 79 16 17 18 27 2 942
10 per cent. £ depreciation 139 189 153 347 83 17 18 19 29 2 995
British Rail:
Current rates 31 4 22 17 8 9 5 3 3 1 103
5 per cent. £ depreciation 32 4 23 18 9 10 6 3 3 1 108
10 per cent. £ depreciation 34 5 24 19 9 10 6 3 3 1 114
National Coal Board:
Current rates 4 23 89 114 41 89 65 19 30 48 523
5 per cent. £ depreciation 5 24 93 120 44 94 69 20 31 50 550
10 per cent. £ depreciation 5 26 98 127 46 99 72 22 33 53 580
British Shipbuilders:
Current rates 6 6
5 per cent. £ depreciation 6 6
10 per cent. £ depreciation 6 6
Total Nationalised Industries:
Current rates 784 627 790 1,103 704 569 485 178 146 106 5,493
5 per cent. £ depreciation 827 661 825 1,159 738 601 510 186 152 112 5,770
10 per cent. £ depreciation 872 697 878 1,226 776 632 538 198 162 117 6,091

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