Just wanted to update here to say I found the problem and solution.
When I ran ‘ip route’ I noticed there were 2 default routes and the one going to the bridge had the lowest metric, so blocked internet access.
Removing the route fixed the issue.
To prevent the route from being created in the first place, I simply removed the ‘,192.167.0.1’ from the end of the ‘address’ line in the file ‘bridge’.
Hope this can help others in the future too!
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