Hi all, thanks in advance for any advice and support.

I got a Mazda 6, 52 plate. (I love this car! TCO currently around £2200 in 9 years, including the £400 purchase price.)

When I go over speed bumps it feels like the rear end sways a bit.
The newest development is a clunk when I corner at any speed.
This is more pronounced at low speeds with full lock.

I took it to the garage today and they couldn't find anything wrong.
Does anyone have any ideas?