Mr McKechnie was among nine of the group’s activists jailed in November for breaking an injunction by blocking the M25.
He served half of a three-month sentence, and was released along with fellow activist Ana Heyatawin.
The activist invited people “to go to the Insulate Britain website and go to one of our talks every Sunday at 4pm called ‘our responsibilities at this time’.
“It will let you know what’s happening next, and how to get involved,” he told the Big Issue magazine.
A spokesman for Insulate Britain said “as far as they were aware” they “haven’t heard of supporters of Insulate Britain not returning to the roads” and that the “campaign is ongoing until the Government issues a meaningful statement to get on with the job of insulating Britain’s leaky homes”.