Tens of thousands of extra school places will be needed by next year amid a continuing surge in demand, the Nation Audit Office said.
Ministers will visit schools in London today to see the problem for themselves.
According to Barking Council, an estimated 1,000 extra primary school places will be needed in Barking each year, in line with projected population growth.
More top news
ITV News can reveal the number of potential buyers for Tata's steel business in the UK is more than double the previously known total.
Officers combined hip-hop with bagpipes and traditional ceilidh dancing in the hilarious clip.
A paranoid schizophrenic with ovarian cancer will undergo a hysterectomy after a judge ruled she could not decide on treatment herself.