It isn't (directly) up to Howells whether he accepts such an amendment. it will be voted on in the Lords who decide whether they accept it or not. It will then be up to Howells to convince the House of Commons to re-instate the clause as was, or to come up with some alternative.

So our lobbying of MPs needs to be kept up, especially if any of these amendments are passed.

(The amendments by Lord Beaumont of Whitley would be even more benefical to the cause than the one quoted above, as they would delete music, plays and dance entirely from regulation under the bill as I read them.)