Helicopter gunship over the M25

[robemcdonald]

Driving anti clockwise around the North of the M25 at around 15:10 this afternoon and a gunship I was unable to identify flew overhead. It basically followed the course of the road at I guess around 1000 feet.
My initial thought was AH64, but the fuselage seemed wider and the tail looked wrong. It did have mast mounted sites though.
Does anyone know what it might have been?

[robemcdonald]

100% sure it was a gunship as it had a Mast Mounted Sight and weapon pylons.

Like I originally said I thought it was an Apache, but looked wider and the tail looked wrong. Must have been the angle I was viewing it from.

[robemcdonald]

So I'm driving up the A5183 today at 15:49 and what do I see?

This time it was definitely an WAH64 / AH1 / whatever they're called this week. Flying at about 500 feet heading roughly towards harpenden.

Do I need to be worried?