Hi 
I am a 37 yr old guy from the UK. I was convicted in 2015 in the Netherlands of a sexual offence, and completed my sentence of community service. I now live in Switzerland, and under Dutch and Swiss law, I am no longer required to notify authorities regarding my travel or whereabouts. However when i first returned home (the UK) to visit family in 2015, I was detained at the airport and my details were taken and I was put on the Sex Offenders Register. Since then I have only returned to the UK once only and the police came to my family's house on Christmas eve to ensure my sister knew the details of my conviction because I have two young nephews, both of whom live in the same house I was staying in. My family all know about my conviction, so I am not worried about anyone finding out, I am more concerned about teh police arriving at my sister's house again - because I would like to avoid her having to deal with that again. 
Since I am living in Switzerland, I don't have a police authority in the UK, where I need to register or keep in contact with. Can anyone share any advice on how I might be able to communicate in advance with the relevant authorities that I am coming, and that my sister and family are all aware. I am then more than willing to visit the local police station during my stay if that is necessary. I just want to keep my family out of it, if at all possible. 

Thanks in advance
a