Mrs H. wrote: I have always wondered why they are never used in GB.
1/ They are... Uncle Jon's Streamer Course, Flying Pig Wood, OUOC Shotover 1987.
2/ Like anything else, they can be screwed up. James (6) tried one in France last year - track to 1 then track to 2 -streamers from 2 to 1 - track to 2 streamers to 1 and repeat to point of tears. Unlike a continuous string, a single missing streamer can send you away with the fairies... Also, if you arrive by navigating, there are two streamer routes leading away from the control - which do you follow?