In my opinion LSU has gone from being what appeared to be a good school to, I'm afraid to say, a poor school. All in the space of a 2-3 years.
I think the staff (the ones I know of) are poor at dealing with anything that isn't run of the mill / no issue / day to day school stuff. And to be honest, even the day to day school stuff seems to be pretty bad too.
No end of supply teachers are being used, specific subject teachers (e.g. French teacher) teaching a different subject group (e.g. Maths), watching far too many movies in lesson instead of learning, unruly girls being allowed to disrupt at will.... and some other more serious things.
It's of no surprise LSU's GCSE results have declined...... from being +80% A-C, down to being in the 60s now I think.
Of course, it's possible that girls can make it through their time there problem free with decent or good results (although I think your daughter would need to be pretty self sufficient academically); but if the time comes that you or they need the school to help or provide support with anything then don't hold your breath. Report bullying that needs urgent attention.... don't be surprised if you have to contact the school numerous times over a period of weeks for them to even respond or acknowledge you.... ending with them making promises of how they will deal with things.... only for them to do nothing at all and allow the situation to continue.
Obviously this all sounds like an isolated opinion, but speaking to other parents, they also have their own stories of how the school has let them and their child down.
In my opinion and from what I have actually seen, LSU is a school in the middle of rapid decline, and I would strongly advise anyone I know against sending their daughter there.