Police have arrested a 36-year-old man on suspicion of four arson attacks in Worcester Park.
The fires have all been since December 11 last year.
After initially being arrested on 19 January 2013 on suspicion of one offence, he was re-arrested yesterday on suspicion of three further offences.
The offences being investigated took place at the rear of WH Smith, the front of the Poundland store, to recycling bins in Waitrose car park and in a refuse bin in Longfellow Road.
The man has been bailed to return to Sutton Police station pending further enquiries. If you have any information that could help police, call Sutton CID on 020 8649 0747. Alternatively, call Crimestoppers anonymously on 0800 555 111.