As someone who works at the University of Worcester, I'd like to reassure you that a first class grade (A- or higher; 70% and above) is just as easy - or just as difficult - to obtain as it would be at Keele, say, or any other university; our system of external examiners sees to this. I do not know anyone who grades student work using the 19 point scale. Instead, markers use the standard grades (from A+ down to H) or percentages and THEN convert to the 19 point scale for entry to the Registry system. I cannot recall the rationale for introducing the scale in ~1995, but I think it was to encourage staff to use the full range of grades at the top end. Have a word with your academic tutor about this; they will be more than happy to explain the system and, critically, reassure you that you are not at any disadvantage when it comes to grades and degree classifications. I hope this helps.