How do we know we can trust the latest polls? | Brief letters

Opinion polling | The trouble with subtitles | Thatcher in your bedroom | Local government | What to call relativesDrs Mellon and Prosser explain (Letters, 6 May) why the opinion polls were wrong at the last general election – a failure to obtain representative samples. Specifically, pollsters did not contact enough people from hard-to-reach groups that do not vote in elections. What I want to know is, has this mistake been eliminated in the current polls, which are being respectfully repo