Two-way lights controlling ceiling downlights UK

Good Afternoon,

I am based in the UK and I have two-way switches controlling multiple downlights in a ceiling.

In one switch I have single connections into L1, L2 and COM.

In the second switch, I have 3 cables into L1, two cables into L2 and a single cable into COM. I also have 3 naturals all connected together.

I have a Shelly 1 and a Shelly 1L available. Please can someone point me in the right direction of the wiring diagram I should be using.

Thanks,