UKIP came a strong third, gaining over 20 % of the votes but no seats, leaving them with 5 seats on the council and losing their status as main opposition party. (en.wikipedia.org)
However, as the leader of the UK's main opposition party there is at least a theoretical possibility that he will one day be in the position of deciding whether or not Britain should take military action to defend our neighbours and allies. (politics.co.uk)
This is not the trend usually associated with main opposition parties as the mid-term of a parliament approaches. (theconversation.com)