BRITaIN is almost certain to suffer drought in some areas next summer because poor rainfall is forecast this winter, Caroline Spelman, the Environment Secretary, said yesterday.  The South East already had low water levels after the drought in spring and reservoirs and rivers have failed to refill during what appears to have been the second warmest autumn on record.  Central, eastern and south-eastern England are also unlikely to see a full recovery from drought conditions in 2012. If there is a sustained drought in these areas, then hosepipe bans are possible.  It is expected to be declared the second warmest autumn since records began 352 years ago but winter officially begins today as forecasters say colder weather is on the way.  Mrs Spelman said yesterday that people needed to start saving water now, by fitting water-saving shower heads and devices in the lavatory; taking short showers rather than baths and only watering plants that really need it. "Everyone has worked hard to stave off any threat of hosepipe bans this year, and help keep our rivers flowing," she said.  "Unfortunately if we have another dry winter, there is a high risk that parts of the country will almost certainly be in drought next summer, so it's