Explained in plain English
How do polls work?
Opinion polls estimate public support for candidates or parties by surveying a sample of voters. The story mentions a poll giving Labour a 20-point lead, suggesting a likely outcome. Polls are snapshots in time and can influence campaign strategies, though they are not always perfectly accurate.
Stories that explain this
Greater Manchester mayoral byelection sees Labour expected to win comfortablyThis explainer came from a news story
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