Adding second light switch to garage circuit

[Avo Mk8]

@Avo Mk8 following your comment, I revisited the drawing, and I think this is how I could maintain the first switch being a 2-gang as you say, but making the internal lights 2-way.

The first switch is the 2-way internal light setup.

The second switch is the PIR, and if wired correctly at the other end, should provide PIR mode or manual override of the external light, as the black wire provides the permanent live, and the brown wire is the switched "manual on" live.

View attachment 89143

That should work fine.
There's quite a lot of wires to deal with - if the patress is not a deep one, you might be better off with your original idea of twin boxes.
If you are familiar with Wago connectors you might find they help.

 

[Edward Morris]

That should work fine.
There's quite a lot of wires to deal with - if the patress is not a deep one, you might be better off with your original idea of twin boxes.
If you are familiar with Wago connectors you might find they help.

Thanks again for all your comments, I really can't thank you enough.

I am familiar with Wago, I have a box 3 wire 32 amp connectors already, but point taken about the amount of wires, it did also cross my mind that it might be a challenge to fit it all in.

I can't be the only person who gets hungry when talking about Wago, it's so close to Wagu beef!

 

[Edward Morris]

Just wanted to follow up with a big thanks to @Avo Mk8.
Did the job last weekend, and it all went really well.
I bought an extra deep back box and managed to fit it all in the existing 2 way 2 gang switch, so it looks nice and neat, and everything worked first time.
Thanks again.