This article is about the Class III road numbered C204 maintained by Luton Council. For other roads numbered C204, see C204.
The C204 is Icknield Way, Luton. It is unclear how much of it is Classified Unnumbered Road, and how much plain Unclassified, however the road begins at a roundabout at the A6 and runs south to the River Lea at Limbury, with the last short bit being a cul-de-sac off the main route (which continues along Neville Road). A sensible guess is that the Class III status goes no further south than Bramingham Road, which traffic to Dunstable and the town centre is directed along.