Seedling ID please?

[EssentialHummus]

This little thing popped up a few weeks ago in the pot occupied by a b&q red pepper plant. Does anyone know what it might be? I’d assumed pepper but leaves look quite different.

That looks like a cucumber/courgette type thing. Free food! Pot it up seperately and see what you get

ditto courgette/squash/pumpkin? did you use home produced compost?

Thanks both. liv - no, compost was bought too. I'm growing courgettes nearby, but pretty sure in where I planted.