The nature of the debates in Westminster Hall in part reflects the different tradition, it would be best to say, of the British House of Commons, where party discipline is much more fluid. They have the three-line whip system, so that the government stakes out aspects of business that are crucial and then allows dissent on a wider range. That has existed previous to the adoption of Westminster Hall. Where the debates were chosen, the culture in that chamber reflected this aspect to some extent. Members were used to having a diversity of opinions.
It also speaks to the broader relationship of the MPs with their whips. There is not the same ability for party leaders to deselect members as the ultimate threat. It's chosen by constituency associations and then on from there.
That said, where it has made a greater difference is in the ability of individual members to hold a debate as part of a broader advocacy on a particular issue. Oftentimes, what you will see is a member raising a particular issue, say, pancreatic cancer, as a first step. Then it might lead to another debate and potentially a bill.
As part of my own research, I looked at the evolution of the law in metal theft. Scrap metal theft is a large issue in the U.K. They have many old buildings. It started with a Westminster Hall debate, then went on to eventually be a private member's bill to regulate scrap metal dealers. That has empowered backbench members to build a broader campaign. It has provided more tools to allow that sort of advocacy.
In terms of the basic relationship between members and their parties, it has always been a bit looser. However, in recent years, and this refers to Ms. Duncan's point, rebellions have increased. There has been more dissent on votes. In part, that reflects the coalition government period and the current hung Parliament.
I hope that responded to your questions.