Strangford Lough is an area affected by powerful tides from the sea. It is a short distance south west of Belfast in Co Down.
It is popular with all sorts of watersports enthusiasts and a dedicated canoe trail has been laid out along its waters.
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Marjorie and Michael Cawdery, both 83, are understood to have been stabbed to death in a killing their family called "incomprehensible".
Detectives have launched a murder investigation following the shooting in Brent, north west London on Friday night.
Hot and humid throughout the Bank Holiday Weekend.