Interrogation-knot "GB".

Inspiration can appear in the flick of an eye, and then some people get un-inspired if preparation is requiring several hours...
That's why I'll give you a little thing, which can be prepared in advance, and (with a little training) is quickly bound.
It was developed, to bind a POW to a chair, and this is one obvious option, along with tying the 'prisoner' to the handrail at a railway track, in an elevator, or...

1/ Lay a bow of rope under the object, that you want to tie your partner to.

2/ Bend it around the object.

3/ Make a loop from the short end of the rope, and pull it through the bow.

4/ Make another loop, on the long end of the rope, pull it over the bend and the through the loop no. two.
Now tighten the whole knot by pulling the short end of the rope.
Put your partners wrist through the open loop.
Then tighten the knot, by pulling the long end, and lock the entire bondage by binding a reefers knot between the long and the short end.

Here the bondage has not been tightened yet..

Here it's been tightened but not locked.