An assembly committee looked into the emergency response on 7 July and the aftermath, taking evidence from organisations, local authorities and individuals.
Committee chair Richard Barnes told BBC Radio Four's Today programme this morning that lives had been saved by the bravery of individuals on the day. But some 'structures and systematic processes' had not helped and 'they need to be sorted', he said.
Mr Barnes explained: 'All of the plans which everyone had drawn up - the police, the fire service, the ambulance - they are service specific and they help the organisation itself. But they don't look outwardly to the customers, the people they're dealing with.'
For example, procedures say a rendezvous point has to be established for emergency services, but not for survivors. 'If you're going to have follow up with the survivors, you're got to know where they are and who they are,' Mr Barnes said.
The report will also highlight the problems with communications on the day, such as the inability to communicate underground and the failure of the mobile phone system. City of London police closed down the mobile phone network without orders from gold command.
DEPARTMENT FOR COMMUNITIES AND LOCAL GOVERNMENT STATEMENT