The only thing I've had to use the long one for with my kids is passports (and stupidly didn't get them when registered so had to pay more), everything else, opening bank accounts, schools etc the short form is fine.
So we now have two for each of the children (one long, one short), only a long one for me (british consulate certificate so they may only do a long one), and my husband has two one in his birth name and one after he was adopted - a Northern Irish birth certificate stating he was born in Wales