Hi Ameliemum, My dd also had her second 'no' letter from RBS JA's today
I would highly recommend LJB. My daughter started as a JA last year and is loving it despite the early mornings. They are not so concerned with a certain type of physique, more on ability and a love of ballet. The teachers are really lovely with the children and they learn really great technique through non syllabus work, plus some flexibility and revision. They will however be moving to West Acton in September and depending on where you are in Essex it may be a jaunt around the Nth Circular or perhaps too far? Some people travel way farther to get there though and some stay over the night before!
Don't give up, there are loads of other opportunities and so many stories of dancers who were never accepted into RBS but had amazing careers! X