I have wondered this before as well but as it happens I was look on my DD's school website this morning and found a link to UCAS. I was looking under the Conservatoire tab and parents tab and then I noticed they had links for qualifications for UCAS points. So I looked and I didn't realise there were so many qualifications to use for UCAS points and if you scroll through the very long list you will see that things like ballet (Grade 6 -

and Music exams (Grade 6 -

and I think there were Speech exams and possibly Lamda exams listed so I suppose it is possible that they were thinking that Lamda exams would increase your DC's overall points score.
But it's my understanding that to get into some of the drama schools, the audition takes priority over the UCAS score and grades they have in A Levels or BTECs. But obviously it is better if they do get their grades in the A Levels or whatever school / colleage exams they are studying. Anxiously biting my nails as DD is doing AS at the moment.
Does anyone know if the fact that a DC has been accepted at places like Junior Guildhall or one of the Junior drama activities like Globe Young Players can be included in applications for Drama School? They don't get into these junior courses unless they are successful at audition so does that count for something?