A 33-year-old man from Cardiff arrested on suspicion of causing death by careless driving, has been released without charge.
The man was arrested in connection with a crash on the M4 on May 22, after 53-year-old motorcyclist Peter Tweddle, from Slough, died, before being bailed until Wednesday, July 29.
The crash occurred on the eastbound M4 near Junction 11 in Reading.
The eastbound carriageway was closed for four hours while investigations took place.
No futher arrests have been made at this time and police are still urging people to come forward who have any information about the incident.
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