Essex Police have said the man and woman found dead in a hotel swimming pool at Hatfield Heath were staying there together.
Chief Inspector Nick Lee confirmed police were not looking for anyone else in connection with the deaths.
"As part of the investigation we are trying to focus on what the relationship was between the victims
"It's a very busy hotel, there were a number of functions going on.
"At the moment we haven't ascertained as to whether these individuals were part of any function or not."
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March in the Anglia region has been much drier and sunnier than normal although temperatures have been around average.
Breezy and rather cloudy overnight but mainly dry. On Sunday, becoming wet and windy for much of the morning after a dry start.
It will be a windy weekend with outbreaks of rain at times but also some drier and brighter weather. Feeling milder.