Dave Lee Travis' car was mobbed by photographers as he arrived at his home in Leighton Buzzard.
The 67-year-old was bailed this evening following an earlier arrest on suspicion of sexual offences.
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Thousands of people have linked hands on Westminster Bridge in a show of solidarity - one week after the terror attack in the capital.
PC Keith Palmer, 48, stabbed by Khalid Masood while on duty in the grounds of the Palace of Westminster last Wednesday.
Engineering firm CH2M won the £170 million contract but have pulled out of phase two of the project over alleged conflicts of interest.