GPs voting to accept the DoH's extended hours contract offer will also be given the opportunity to express their dissatisfaction with both deals.

"it was the less worse of the two"? Is that proper English?

less worst

Poor English - less bad or the lesser of two evils would be less awkward.

as in more better,should it possibly have been "less worser"

 'More better' is a double comparative - grammatically incorrect. I agree the wording of the voting paper leaves much to be desired.