Three children who were found dead at a house in New Malden suffered from spinal muscular atrophy, Daybreak's Chief Correspondent Richard Gaisford reported.
I understand the three children found dead in S.London all suffered from severe degenerative Spinal Muscular Atrophy http://t.co/6NRyHxptIh
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The 47-year-old man died shortly after 3pm on Tuesday.
Specialist explosive detection dogs searched through the town examining letter boxes and phone booths for signs of potential devices.
Temperatures reached 29.1C in St James's Park, central London.