This morning sees the first of a series of public road shows by Network Rail ahead of the regeneration of London Bridge Station.
London Bridge station will be transformed over the next six years as part of the wider Thameslink project - and work starts on the first stage in December.
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Scotland Yard said two murder investigations have been launched following the separate incidents, which both happened in the past week.
Photos show the extraordinary surgical procedures to remove the growth.
The Met Police says 143 firearms have been handed in at stations across the capital in just seven days, including two antique machine guns.