Yeah you can, you dont have xenon units so its not advised, the beam scatters because its not ment for the halogen units and can blind other drivers, however a lot of people do use HIDs...
I think HIDs are also part of the MOT test now and will fail if you have them without the correct xenon units, i read that a while ago though...
Whatever fitment the dipped beam bulb is, if you get a kit for it it should fit, but again i wouldn't advise.