UK accident scam

I had a call today from: 020 8103 3125, They asked me if I had been in an accident, I said yes, last week, they asked me for my cars registration number, I said sure it’s PEN115, the chap laughed and said what I you asking to write down! I replied why are you scamming people, he then replied with why are wasting
my time you SOB! Then hung up.