Regardless of his sentence, he has been convicted and, presumably, will go on the sex offenders' register so ignorance of the law was not a successful defence against conviction. (In fact, I doubt if any British barrister would even have bothered to try that one.) It appears to have been taken into account as a mitigating circumstance as, quite rightly, many specific situations often are.
Hysteroscopy using spinal block/epidural



