Both!Re offence(s): would it be offences if it were one individual on more than one occasion, or individual offences against several people?
From what we’ve read/what’s been published it’s one individual currently which means it happened more than once and is likely to have been harder to establish when one offence ended and the next one started, which is why the victim might have contracted the bbc/police again because they’ve now realised there are several accounts they didn’t realise.
I suspect, that the boy (at the time) believed he was in a relationship with SM, then SM has had enough and then it’s all gone wrong. Even if they just met up at clubs and did things in various spaces which weren’t intercourse, it would still be counted as a serious sexual offences rather than offence. SM has been very careful to just put offence in his statement but the met police put offences. So I bet the one which didn’t meet the threshold is the one SM is referring too, rather than other things which he’s probably got away with