Trafalgar Square was guarded by a battalion of soldiers. Sculptures of 20 wounded servicemen were unveiled there. Rags Martel reports.
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Yousaf Khan and Xavier Christopher took their young victim to a secluded alleyway in Northholt where they also urinated on him.
After a wet and windy start to the week, conditions will gradually improve, with temperatures creeping up, and up.
Sir Bernard Hogan-Howe made the comments as an independent review into the way rape allegations are investigated.