Hmm. Ironically, the party most likely to abolish such laws is probably Reform.

Tories have done approximately nothing, Labour is an old mother lode of speech policing and the Greens with all their postmodern sensitivities plus deference to Islam don't look particularly promising as well.

Once upon a time, Lib Dems were strong on civic freedoms... but I can't remember them doing anything in this regard during the Cameron coalition government.