In the United Kingdom, autocrosses are typically held on a grass or stubble surface. In fact, the attraction is the challenge of driving quickly on difficult surfaces. Cars compete individually against the clock, although more than one car may start at the same time if the circuit is long enough and wide enough. Because the course is usually bumpy and there is a risk of contact with other cars, most competitors use specially prepared cars (which vary from very inexpensive to specially engineered racers) brought on trailers. Events are usually held on a region-wide basis, with the RACMSA (Royal Automobile Club Motor Sports Association, now often called MSA overseeing rules and regulations.
Some people choose to start singularly, particularly if they compete in a rally car. The sport is relatively low risk as there is or should be nothing to hit. However, if you wish, you may do double car starts. Most people opt for this, although some competitors choose to do 3 and 4 car starts whilst still competing against the clock.
There are many local clubs which host across the UK, though the main regions hosting Autocross events are:-AEMC- East Anglia, ASWMC - South-West and ANECCC - North East.