Hello. Just re- read the email I received, This was third hand information and it said
Hello my wife has just been informed by a friend who works for the NHS, to make sure when you are called for the Covid Jab, that you have with you your National Insurance Number as those who don't know it, are causing a bottleneck of mammoth proportions when they go......I am going for mine this Saturday....the invitation did not say you need to have your National Insurance Number, but I have it and will take it with me.
I misread National Inusance for NHS, so unless someone can clarify this, take both.