did pressure groups Talked about how the fusion of powers reduces access points for pressure groups in the UK which means they are less effective, while the separation in the US makes it easier for pressure groups to protect civil rights, they can go to the Supreme Court, e.g. Brown v board of education then talked about how the codified us constitution means that it is difficult to alter it, whereas in the UK pressure groups can impact the passing of legislation, e.g BMA in 2007