@purplefairy287 I think it's fair to say that the grade inflation was mainly due to there not being exams and coursework was assessed. At the end of the day, if a student turn in excellent work, they have to give the grades as is.
Generally, pre-Covid, Eltham was always up there with Dulwich in terms of exam results, and just behind Trinity and always a fair bit ahead of Colfe's. Last year's results were not as impressive as the aforementioned schools which mainly due to the fact that Eltham did not apply the usual Sixth Form entry criteria (of a minimum of 7s in GCSEs, I think, and 8/9s in Maths/Sciences etc) to the cohorts affected by Covid so essentially ending up with a less selective group. I doubt the other schools mentioned were as generous so therefore their results were obviously better!
And, as a through school without an exam for internal junior school applicants (although I believe that if Eltham think your child is not up for the senior school, they will tell you in Y5/6), they will not have the same ability to be selective as Dulwich/Colfe's etc but they still do amazingly well, which presumably shows the added value in terms of progress.
As for the area around the school, Mottingham - it's not exactly gang land territory ;) and it's perfectly safe to get to and from home from there. Lots of big (expensive) houses near the school too.
We have children at EC and have been very happy with the school and leadership.