The cafe is busy and you can tell by the diegetic sound of people talking and the clinking of cups and plates, yet it gives off a sense of calm and normality of the situation. The PCSO's call for assistance brings in a change of mood in the relaxing and calm scene in the cafe; it brings an air of urgency. There is a wheel-screech as the JCB forklift turns into the public area. When the protagonists leave the cafe the music starts (non-diegetic) and when they start driving there is a lot of screeching, implying that they're driving at a high speed, connoting that it's urgent that they go.
I'd give myself a 3 out of 5
