I have noticed that the car is increasingly susceptible to bumps and seems more unstable during cornering.

The back end has come out twice in dry conditions not under insane acceleration but not exactly slow either.

It just doesnt feel planted to me ?

Its on Bc coilovers and Bridgestone Re050's all round with tons of tread. Tyre wear is even. Tyre pressure is checked weekly.

Anyone got a good starting point ? FWIW geometry was done by the previous owner (Tej off here) last year.

 

The coilovers may have settled and altered your Geo...get it looked at to be certain Geo will alter in as little as 6-9 months, mainly thanks to our poor roads

 

Hmmm.

I do go through some horrific roads from Essex to West London on a regular basis.

 

GEO!

 

check ur bushes as well , i had to replace my front lower inner control arm ones just the other day.