I have driven cars in 4 foot of snow without any insurmountable problems.
It also helps that I come from north of the M4 and I am an advanced car driver (company insurance
requirement)
Key elements of driving in snow & ice
* Slow down (allow more time / space for yourself & other drivers)
* Use 2nd gear to move off - gives more control
* Use your gearbox to slow down (try to avoid using your brakes - except for small control dabbs)
* Try maintain steady speeds (so that you can keep going when it going gets tougher - hills e.t.c.
* If you have a front wheel drive car you can "tack" up hills quite easily
* Control your clutch more delicately - it pays dividends
* Do things slowly - every movement will be exaggerated by snow & ice
I hope the above helps less experienced snow & ice drivers