Supermajority vs. micro-opposition: Parliament after the general election?

Government Ministers have been warning of the risks if Labour wins a ‘supermajority’. But does the concept have any real meaning in the House of Commons? If Labour emerges from the election facing a tiny – a micro-opposition – what are the implications? And if the Conservative Party ends up with a similar number of seats to the Liberal Democrats should – indeed could - the rights and responsibilities of being the Official Opposition be split? Is there any historical precedent to call upon?How wi