The gases which have been identified in the latest research are at much lower concentrations than those found earlier this year, and are unlikely to pose a threat to the ozone layer, the scientists said.
"It is therefore unlikely that they will pose a threat to the ozone layer. They do, however, strengthen our argument that there are many more gases out there and the sum of them may well have an impact."
But the researchers said it supported their argument that there were many more gases out there, which could have a cumulative impact.
Dr Johannes Laube, from UEA's School of Environmental Sciences, said: "Two of the gases that we found earlier in the year were particularly worrying because they were still accumulating significantly up until 2012.
"Emission increases of this scale have not been seen for any other CFCs since controls were introduced during the 1990s, but they are nowhere near peak CFC emissions of the 1980s.
We have now identified another two CFCs and one HCFC, although these have much lower concentrations than the previous ones.
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