I have a dream that Iran declared war on the UK and my home city (Manchester) got nuked.

I remember seeing an Iranian plane over the city centre and then everything was silent then I hear air raid sirens going off and a voice saying "Attack Warning Red. Attack Warning Red. Seek Immediate Shelter" I was running fast as I could to find the nearest shelter then as soon as I got to it I saw a bright flash and then an aerial view of Manchester on fire.

What does this dream mean?