The scheme will be subject to a local planning inquiry run by the Planning Inspectorate, probably in June this year, with a decision in the Autumn.
The Government Office for London (GOL) letter announcing the call-in picks out the main government concerns over the scheme:
how the scheme and its design are consistent with PPS1 and appropriate in their context
compliance with PPS3, meeting community housing needs
effect on neighbouring conservation areas
consistency with LB Ealing's UDP, and the London Plan