The most recent year for which constituency level estimates of fuel poverty are available is 2003. The data for fuel poverty levels for 2003 come from the Fuel Poverty Indicator dataset, available online at:
http://www.fuelpovertyindicator.org.uk/
In 2003, there were around 2,000 households in the constituency of Hemel Hempstead living in fuel poverty.
Fuel poverty is not measured at an individual level.