Collins stayed silent as he walked out of the court and got into a waiting car after hearing the verdict.
Detective Inspector Justine Jenkins led the investigation for Hertfordshire Police:
The victim was extremely brave in coming forward to report the offences inflicted upon her. I would urge anyone who is or has been in a similar situation to get in contact with police as soon as possible. I can reassure you that you will be taken seriously and treated with sensitivity.
More top news
Over the next 24 hours we are going to see snow and ice across many parts, although it is looking calmer from Sunday onwards.
A young grey seal found in a farmer's field on Monday is making progress say RSPCA staff. He's thought to have a head injury.
The UK economy, boosted by the inclusion of the sex and drugs industry in the calculations, is now the world's fifth largest, but only just.