The current leader has been whipping his MPs to vote with conservative policy and is generally in agreement with them. They've been some of the weakest opposition I've ever seen. The Scottish national party (SNP) has been the only genuine left wing party with any significant presence in Westminster. The Labour party leader recently threatened the speaker (who is labour but is supposed to be impartial) to stop a SNP debate day when they wanted to pass a recognition of genocide in Gaza.
They're selling point is they are more competent and less cruel than the conservatives. The keep on dropping their more progressive policies. Recently they've dropped their reform of the house of lords, an unelected chamber that currently places religious leaders and Russians with KGB ties in unaccountable legislative roles for life.