The blue triangle represents a triangulation pillar; the networks of concrete pillars found in the UK that were used to make maps. These are lines drawn on maps that join places of the same height.
The Met Office has warned the deep freeze will bring about hazardous icy conditions on the roads over the next few days - ...
The Met Office has warned that temperatures could plummet as low as -7C in parts of the UK this weekend - with some areas ...
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