What Evidence is there that Britain has a Dominant Party System [Only Cares for that Usually only 1 Party can Form Government] (EX)

-1979 to 2010 had UK had 1 Party in Government [18 Years of Con, 13 of L] -Coalition that had Followed only was Temporary ‘Myth’ and since 2015 the Election has been Normal [But 2017-2019 needed DUP votes for Legislation to be Passed] -Only the Con, since 2019, has had 56% of Seats [HoC] -Even May’s Minority Government could Control the Agenda of Parliament - May could Delay Votes on Brexit to whenever She Wanted too -Weak Government could thus Dominate Parliament. Conservative survived a Vote of No Confidence in Jan 2019