Thames Valley Police are re-investigating the deaths of eight people dating back to the 1970s.
Cold case detectives say the deaths - which occured in Berkshire, Oxfordshire, and Buckinghamshire - are unrelated.
The operation, named Nightingale, has been established as police have previously been unable to identify the bodies in each case.
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Pollen levels are very high
Showers continuing to clear this evening for a mostly dry night with clear spells.
Heavy showers clearing for a dry night ahead.