Emergency services have reported "casualties" following a suspected gas leak at a shopping centre in Southampton.
Hampshire Fire and Rescue Service said a number of people were receiving medical treatment after the incident, which prompted the evacuation of Sainsbury's and Marks and Spencer stores.
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"You are one of the silence breakers and we all owe you a debt of gratitude."
Maximum temperature 11 C (52 F).
A cut in stamp duty to help first-time buyers is likely to push prices by at least the amount the reduction is supposed to save, MPs said.