IPv6 IP address leak using policy-based routing

Perfect; thanks. The mullvad prefix is fc00:bbbb:bbbb:bb01, so I'll do this:

config globals 'globals'
	option ula_prefix 'fc00:bbbb:bbbb:bb01::/48'

and then in /etc/config/network, the following stanza:

config interface lan
        ...
        list ip6class local
        ...
       

Will let you know how I get on. Thanks for your assistance.