You would say that Evangelical Christians are Conservatives: they have to be by definition, eh OP? And according to you - a Conservative - Abolitionism is Progressive.
Well, say hello to local hero William Wilberforce: Evangelical Christian and Abolitionist.
His home - now a museum & memorial - is preserved by Hull City Council: Labour, ergo Progressive.
No doubt Humberside Police have dealt with those involved in human trafficking; their actions against such no doubt praised by Hull City Council.