A dodgy subject this but I have to say that we should all vote even if you spoil your paper to express total disgust with all the parties. I always make the effort as peolpe have suffered and died to allow me the chance to express my thoughts even if as we all seem to agree that there isn't much to choose from.
I've long argued that just 2 changes are needed.
1. Mandatory voting with a £250.00 fine for not voting.
2. A space on the paper "None of the above". If None of the above won then all those on the ballot paper would be blocked from standing for public office for 5 years.