Indeed, I am unaware of any insurance for a cyclist that gives me that kind of cover. Thus to recover my losses I need to be in a position to undertake a long a legal battle, without income, against an insurer who will try everything to get out of paying for what I am entitled.
As for human rights, there is no suggestion that a person's right to be considered innocent until proven guilty will be eroded by the introduction of presumed liability, nor will your human rights be violated (sigh). Nor will it automatically pay out to any cyclist hurt by a vehicle, especially one trying to pull a fast one. This proposed principle (which already exists across europe) levels the playing field for all road users whereas currently the pedestrian, horse rider and cyclist are all at a significant disadvantage.
Under this proposal, if a pedestrian/cyclist/horsey-type commits a mistake and is injured then he will not be able to automatically claim compensation from the other party's insurance, he/she can try but will most likely fail. Where it does differ is that the same road user who is not at fault and suffers financially will not automatically be assumed to have committed an error, which is the current situation. The status quo is massively in the favour of the motorist.
If the argument of human rights is considered valid*, then when you take in to account my last statement, you have to ask what about the human rights of non-motorist road users? Discrimination? Right to life?
*but it isn't because the human rights act talks about being held guilty of an offence. This proposal has nothing to do with criminal law.