Tilly, if I can, steer the opp way to the skid, an indication of ice a very light steering, lighter than normal, if your screen is iced up so will the road, a kerb can at times help to stop the car but that depends on your speed, try and use the Handbrake in slowing you down, do not pull it straight up but gradual, in snow use a higher gear for traction, a front wheel drive will grip the road, a rear wheel drive normally skids depending on the driver, my own car is rear wheel but has never given me trouble as I control my revs & that's what's it all about, "REVS" I hope this little bit of advise may help you without sounding clever.