In the UK, police can use your silence at time of questioning to cast doubt on future exculpatory claims that you make. In the US, the government can never make that argument in court. So in the US, the best course of action is, without qualification, to remain silent until speaking to a lawyer. In the UK, doing that can be presented as evidence of your guilt. https://en.wikipedia.org/wiki/Right_to_silence_in_England_an...
The United States is the only country to take the position that some police misconduct must automatically result in the suppression of physical evidence. The rule applies whether the misconduct is slight or serious, and without regard to the gravity of the crime or the power of the evidence. “Foreign countries have flatly rejected our approach,” said Craig M. Bradley, an expert in comparative criminal law at Indiana University. “In every other country, it’s up to the trial judge to decide whether police misconduct has risen to the level of requiring the exclusion of evidence.” https://mobile.nytimes.com/2008/07/19/us/19exclude.html