Complex sentence: The main opposition to the bill from Labour backbenchers concerned the "variable" or "top-up" fees, therefore an amendment tabled at Report stage to remove references to these variable fees appeared to have some chance of succeeding.
Split into simpler sentences: The main opposition to the bill from Labour backbenchers is the "variable" or "top-up" fees. Therefore, an amendment tabled at Report stage to remove references to these variable fees has some chance of succeeding.