Australian teenager arrested on suspicion of helping to plot a terror attack on Anzac Day commemorations . The 14-year-old allegedly communicated with an British man over plot . Five men arrested by British police after tip-off from UK officials . Police are reviewing security arrangements for Anzac Day events in Britain .
British teenager arrested on suspicion of helping to plot a terror attack on Anzac Day commemorations . The 14-year-old allegedly communicated with an Australian man over plot . Five men arrested by Australian police after tip-off from UK officials . Police are reviewing security arrangements for Anzac Day events in Britain .