The projected turn-out for the by-election of 400 - 500 people is abysmally low.
If anything it does say that people don't like any of the choices. The UBP have the most to lose, the BDA the most to gain. And such a low turnout makes it a bit hard to know quite how it will play out. The results could be quirky, but the meta-message would be that the level of voter disenchantment is exceedingly high.