It'll be in their examiner's report , somewhere. They will say there was an exceptionally high standard this year, I imagine. I doubt last year's boundaries were the same which is why teachers hate being held responsible for predictions , especially in subjects like English! They may also have found their markers were over generous and are compensating, but that usually happens with coursework, rather than exam.
The standard won't have changed much : it's a % of students getting each grade which is fairly fixed (and why the alarmism over low maths grade boundaries is nonsense, really : it's how Edexcel may have fixed their problem of a very hard maths paper)
The other issue with OCR English is it is favoured by selective schools, so will, therefore, have many many brilliant scripts. You'd like to think they'd all get As and As then, if they deserve it, but, in practice , they will still have %s of each grade similar to other exam boards (slightly more A and As iirc)
Oh, for one , unified board!!