creak coming from front left suspension

[M4SGK1986]

Hi everyone i am new to the site and i have a 2004 Boxster 2.7 that i have owned for 5 years.

I have noticed over that past month or so that i get a creaking noise coming from the front left suspension. I don't get it when turning the wheel at all even when stationary, it is only when i drive along. It happens when going over both small bumps as well as things like speed bumps (its louder over things like speed bumps). It also only happens when it is dry, it doesn't happen when it is wet. It sounds a bit like an old creaky door with grit on the hinges!

could it be something like a dry/worn anti roll bar bush??

any ideas?

thanks