Phillip Sherriff's widow Jane tells London Tonight's Ronke Phillips it was really hard sitting through the Ashley Charles court case. She said she experienced a "roller coaster of emotions".
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Most importantly we need you to look after yourselves and each other, remember there are no safe ways to take drugs.
Passengers looked horrified as the girl took the potentially lethal shortcut between platforms.
Police were called to Kilburn High Road at 5.20pm after reports of a shooting.