Thank you.
It is a two wheel trailer. It weighs about 10kg empty and has side bars. I've ridden with it loaded a few times, had no idea how fast I was going, but not had an issue.
I guess I was more worried about doing damage to my bike as it attaches to the wheel / QR and this is my only daily bike. I guess i'll go with common sense and not attempt v max down the biggest hill I can find.