Cyclone Phailin has made landfall in Odisha state on the east coast of India, the India Meteorological Department (IMD) has confirmed.
The cyclone's wind speed as it made landfall was 200kph, which was marginally less than expected.
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Higher food and petrol prices are expected to send inflation to its highest level in 28 months when official figures are released later.
The Prime Minister will detail her 12-point plan on negotiating Britain's exit from the European Union during a speech on Tuesday.