I've just read through all the responses to the OP and they demonstrate quite clearly many of the difficulties there are nowadays in getting that first job after graduation. Also that the correlation between having a degree at all, the class of degree and where the degree was obtained may or may not influence future employment prospects
One of my sons did an engineering degree, although not at a RG university. He was very ill during his course and was only able to complete it through sheer determination. He missed a 2:1 by a single point so his final degree was a 2:2, nevertheless he was one of the first in his cohort to be offered a job - after submitting a CV, completing an online application form, psychometric testing, a phone interview and then a day of individual and group project work, a presentation and an interview! He is very bright, hardworking, resilient etc, but I think he actually got to the interview stage, not because of, or in spite of, his degree (after all, everyone who applies has got the 'essential' qualification), but because of his extra-curricular interests. I believe that employers are looking for people who have already demonstrated work capability and he was able to do that.
vickymeldrew The point I'm trying to make is that the class of degree is only one area of importance when it comes to getting employment. It's hard seeing young people become demoralised and losing motivation, but I'm sure if she perseveres your niece will get there in the end and in the meantime your support will mean a lot to her.