A convoy of caravans have set up camp at Cannon Hill Common.
The group, including caravans and vans, arrived yesterday parking up at the local nature reserve.
There have already been claims by residents of fly tipping.
Samantha Roberts, tweeted Merton Council to say that rubbish had already been dumped since the group arrived.
Both the police and Merton Council are aware and have said they are working to resolve the issue.
A spokesperson for Merton Council said: “We were made aware of the vehicles on Cannon Hill Common and have a joint protocol with the police on how to respond to unauthorised encampments which we are working through now.”
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