Police have published two photographs from a memory card found in Earlsfield, in an attempt to reunite it with its owner.
It was discovered inside a digital photo frame, within a blue Ikea shopping bag, that was handed in to police by a dog-walker.
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So far the Government has received samples from a number of high rise buildings where the cladding has failed safety tests.
The father-of-four from Cardiff with appear in court this afternoon charged with terrorism-related murder and attempted murder.
Industrial vacuum cleaners and magnetic wands will be used each night during the summer to remove metal particles, dust, oil and grease.