Yes. Illegal and pikey.
They only look good when you have a projector lense.
Retrofitting HIDs to a original Headlamps is ILLEGAL regardless of bulb colour and regardless of lens type, no ifs, no buts, no grey areas, nothing.
You can legally retrofit halogen headlights if you use the full headlight unit, self leveling, and headlamp cleaning.
See this link for factual information on the UK legislative standpoint on Aftermarket HID headlamps. [URL="http://www.dft.gov.uk/pgr/roadsafety/drs/hidheadlamps"]http://www.dft.gov.uk/pgr/roadsafety/drs/hidheadlamps[/URL]