Yes. Hybrids should also comply. Have to check for the first year, but it's no later than 2003 for a petrol/electric. A petrol/electric hybrid I think falls under petrol - so I think 2001. A diesel/electric falls under diesel - so I think 2004. That's for passenger cars. Normal rules for commercial vehicles also apply. Exception for hybrids is that with the MOT-tests you do not have to measure CO. Obviously because the petrol engine would not fire up.
Only exception would be a vehicle with natural gas as main fuel. That may have an extension up to 2006.