the licence holder has been convicted of an offence that is a relevant offence (and which was a relevant offence as at the date on which the licence in question was issued)
bod deiliad y drwydded wedi ei euogfarnu o drosedd sy'n drosedd berthnasol (ac a oedd yn drosedd berthnasol ar y dyddiad y dyroddwyd y drwydded dan sylw)