I agree with Am.

I have taken my gear to Europe and UK many times, never had an issue. It went with me EVERYWHERE, basically never left my sight, always right next to me even to restaurants at night with me. If I was in a restaurant/cafe etc, I would have the strap either around my leg or the chair leg I was sitting on. Just be aware of what is going on around you, watch for suspicious looking people, always keep an eye out for anyone who doesn't belong.

My last trip to Japan and Singapore I took D810 Tamron 15-35 f2.8 VC, 24-70 f2.8, and 80-400 f4.5-5.6G VR. In fact, I have taken my gear on every overseas trip I have been on in the last 12 years.