A spokesman for the LLDC board, which is tasked with sorting out the stadium's future, said:
"We have been notified that Leyton Orient have made the decision to issue proceedings for judicial review.
"Whilst this is disappointing, we believe that our processes have been robust, fair and transparent and that the challenge is misconceived."
More top news
According to a recent report young carers aged 5-8 are amongst the most hidden and least supported group of unpaid carers in the UK.
The review will look at how the city would cope if multiple terror attacks were launched.
Eric's been performing his impressive stunts at Clissold Park and even skates the half pipe.