If it looks like it might rain, the umbrella rides behind the seats. If its raining, it rides down the passenger footwell until needed.................................
More convenient than a tube.
Same here. You need to be able to grab the brolly and get it up quickly if caught in heavy rain.
Then you can sit out the worst in a lay-by. Saves having to get out and put the hood up.
Tim H. 1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE