CCTV footage from inside Westgate Mall in Nairobi shows four heavily armed gunmen who were involved in the massacre of at least 67 people.
It follows comments by a government official that suggested there were fewer gunmen involved in the attack than originally thought.
More top news
Nigel Farage warned on Friday Britain was "far less safe" and exposed to Cologne-style sex attacks because of open-door immigration.
Arthur Simpson-Kent, 48, admitted killing Ms Blake and their sons according to his lawyer.
Two brothers have been arrested on suspicion of murder after their parents were found dead in their own home over the weekend.