Raiders broke into a ticket machine and stole thousands of pounds.
The pair, described as white men, forced open the machine in the upper level of the Mercury Gardens car park, Romford, and made off with £3,300 in cash.
Anyone with information about the theft, which happened at about 1.45am on Monday, March 4, should contact Romford CID on 101, or call Crimestoppers anonymously on 0800 555 111.
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