Well, I was in a similar predicament to you back in sec sch.
Skipped my cca training, got fired and couldn't be bothered to get
another. Then smoked my way through the rest of sec sch life.
Luckily I got alot more active in JC...
Don't repeat my mistake. If you really want a good CCA record,
then work for it. Joining CCA for the mere sake of records is
useless though, it shows how shallow a person you are. Since you do
like scouts, stick with it and get committed. Even if you get into
say RJ or HCI without your CCA, if I were the scholarship
interviewer I would never give you that scholarship, because you
don't show an aptitude to commit, to show you deserve the
scholarship.
What you need isn't advice on your CCA. What you need is a self
reflection of what your dreams are and how much blood, sweat and
tears you are willing to put in to get there.
I can tell you one thing: at this rate, forget the UK
university you want. Some serious housekeeping is in need here.
Harsh but true.