I picked up Revlon Seductive a few weeks ago as it had caught my eye a few times. This is a very deep purple color that looks black in some lights.
Seductive applied opaque in one coat and I was really impressed with the longevity of it. It was on my nails for over a week with very few chips.
I think this is a great color that will take you through Autumn and Winter, I can see myself wearing this a lot.
Revlon polishes are on the slightly pricer side of things at £6.49 and you pick them up from Boots.