§ Hugh Bayley
To ask the Chancellor of the Exchequer what(a) the value and (b) the interest paid on the national debt has been in each year since 1990. 
§ Mr. Timms
The measure used in this Government's sustainable' investment rule and in international comparisons of debt is Public Sector Net Debt as a percentage of GDP.
Figures for public sector net debt and central Government debt interest payments in current prices are available on the Office for National Statistics website: http://www.statistics.gov.uk/StatBase/tsdtables1.asp?vlnk=fsf. Table 1.1A: Public Sector Finances (series RUTN and RUTO) shows figures for public sector net debt in £ billion and as a percentage of GDP. Table 1.1C: Central Government (series NMFX) shows debt interest payments in £ billions. No data is available for debt interest payments by local authorities or public corporations.