The London Mayor's Question Time was temporarily suspended today after protesters disrupted the conference. Firefighters chanted "No ifs, no buts, no fire service cuts", causing the Assembly members to leave the Chamber as order was restored.
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Police were called to a fight between two groups of people on the petrol station forecourt at Cobham services.
The barriers are part of a series of measures put in place by the Metropolitan Police.
Resident group Justice 4 Grenfell say they were not consulted and will raise concerns about the appointment at the highest level.