Theresa May speech after Manchester terror attack

The transcript discusses a COBRA meeting addressing the Manchester terrorist attack, detailing the attack's impact, the perpetrator, and the victims. It highlights the bravery of emergency services and the community's resilience. Investigations suggest a possible wider network, leading to an increased threat level from severe to critical. Additional security measures, including military deployment, are being implemented to ensure public safety.

What did the emergency services demonstrate through their actions?

What change was made to the threat level following the investigations?