How did the RAF Fairford incident go from 'suspected bomb plot' to police bail?

On Sunday morning, a large police operation unfolded in the village of Whelford near RAF Fairford, resulting in the arrest of five men for offences under the Explosives Act. Counter-terrorism detectives confirmed no explosives were found in their three vans, only petrol. The suspects, from London, were bailed with strict conditions, a decision made to encourage their cooperation, despite criticism from Donald Trump.