Just got a very similar lengthy message. There was a video too, i didn’t bother watching it, but i looked like the back if a car and somebody with a gun.They also gave me a miss call. They were asking for £1500. I reported to whattsapp and blocked. Then they messaged from a different number saying worse things. It calms me down to see this messages here, hopefully its just a scam and they’ll move on. I had originally messaged asking for postcode in the Croydon area, but changed my mind, so they were saying they were charging a ‘fine’ for messing about. In case this info helps anybody. Stay safe people.