Help with UK install of Shelly 1L with 2 light switches and 1 light

I have a strange light switch arrangement that i would like some help with. I have created a mock up of the wiring on the light and 2 switches. Can anyone suggest how to wire up the Shelly 1L please.

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Thanks but I’m not sure any of the diagrams match my current setup.

I've been up in to the loft space and this is the complete wiring schematic
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I've looked at a Facebook post from Dimitar Dimitrov on how to wire the circuit with 2 switches and i think i can get it working like this

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I'd be really grateful if someone could have a look and let me know their thoughts.