MPs as Trustees
One topic covered in my u/g Democratic Theory module is the nature of representation, starting with the delegate vs. trustee argument. At least since Burke, it's been argued that MPs should exercise their own judgement, rather than simply being a voice for whatever their constituents want. But delegates are also representatives. A point seemingly missed here, when it says: "Members of Parliament are representatives, not delegates, the difference being they are there to decide what in their judgment is good for us and the country, not simply to do what we say."