Time for a new cassette - ?

[simongt]

Probably a silly question, but the gears on my commuter have begun to slip; usually when I'm taking off in one of the higher gears. Feels like the ratchet on the freewheel has worn and isn't gripping properly. general pedalling isn't a problem, only when I'm taking off from a stop. As my commuting bike, it does around 4500 miles a year in all weathers. I keep the drive train lubed and ( reasonably ) clean. The current cassette was put on nearly two years ago and it's on it's second chain.
So, new cassette & chain then - ?

 

[Yellow Saddle]

Yes.

 

[simongt]

Thanks; off to the LBS then - !

 

[Tojo]

Yes.

I'm impressed you answered a question with only one word, are you ill mate............

 

[Yellow Saddle]

I'm impressed you answered a question with only one word, are you ill mate............

No.

 

[Karlt]

Check it's the chain moving on the cassette and not the cassette spinning freely on the hub...