Can anyone clear up a few questions I have about adding digital tv to the car

Ireland broadcasts in mpeg4

So id need an mpeg 4 dvb-t box

But the uk broadcast in mpeg2 so If I buy an mpeg 4 box It will just give irish stations is it ?

But if I bought an mpeg2 box would it pick up the digital uk channels in the car ?

Whats the recommendation go for mpeg2 , mpeg 4 or a box with both