California stop lights modification

[Briza]

Has anyone wired the boot lid lights to come on with the brake lights at all? Is this and easy modification, is it legal in the UK?
Cheers

[ex-devonpaul]

Have you seen this?

https://www.dropbox.com/scl/fi/nqy7d7wgbi3h7rrokwm...

[Briza]

Brilliant, thanks for that, the only thing thats not clear to me is how the original brake lights come on with the trunk open?