A few weeks ago I went 100 miles to a party with a Martian theme. I had to make a costume that I could take on the bike - got some funny looks from car drivers

Easy.

I plugged in some rear indicators!

And a bigger numberplate.

And some baffles.

Makes the rear end so much neater. Are the indicators actually visible though

They are really good. I think the issue legally is that the two flashers are not the specified width apart. But they are very bright and any car following would certainly know that you intended to turn or change position on the road. (Which is all I care about. )