Mr. Tim Duggan:

The public service identity dataset has a whole load of data elements in it and each of those has to be verified to bring somebody to SAFE 2 level. One of those is the former surname of the mother. As far as I am aware, that is not on the short version of the certificate. That is why, on occasion, the long certificate is required. It is to verify that data element. The same applies if a person is applying for, let us say, a passport. It is unusual that it would only occur once in a person's life. It means that they have not been through the passport process either but if they had, they would probably have to do the same thing.