Car keeps juddering..., What could it be? Options

[boombastictiger]

Hi

Well the issue I have is that at slow speeds say in 1st and 2nd gear when im accelerating slowly at low speeds, sometimes it jerks slightly back and forth forcing me to apply more acceleration to smooth it out or switch it up a gear. Also the same occurs whilst de-accelerating at the same low rpm speeds and gear range. I thought it could have been the clutch, which was on its last legs anyway, so I changed it but no luck.

Its really annoying because at slow speeds in traffic it can be a bit of a pain to have the car jerk slightly back and forth at slow speeds... Im starting to think that maybe the spark plugs need changing as it only happens at slow speeds and when I apply more throttle its fine...?