I'm with Pierre, Howard, Clive and Rutty. My Spitfire had seemed to have become invisible on the road now that everybody else has DRL. I have wired the side lights to come on with the ignition (via a relay) but I put a diode in the circuit to stop the rears coming on too, on the basis that the brake lights need all the contrast they can get.
Bizarrely, my modern (a 22 year old Saab) doesn't have DRL.