King Solomon High School in Redbridge says it will continue to let pupils celebrate their bar and batmitzvahs in school.
Last week JFS in north London announced it was ending bnei mitzvah ceremonies at the request of local congregations which felt that they might discourage youngsters from having them in synagogue.
But King Solomon head Spencer Lewis said this week: "We have always offered our students the opportunity to celebrate their barmitzvah at the school. We believe it is important that we do this and almost all the families who take this up are not members of
a synagogue for whatever reason.
"We believe that it is vital for us to celebrate together with our students and we have never had any complaints about this from local rabbis."
As an Orthodox school, the ceremony was available only to halachically Jewish students, he said.
The school also has a six-month batmitzvah programme culminating in
a special celebration in July.