The advice given on a TV programme a few days ago was keep them in the cooler part of the barbie away from the coals and don't prick them making sure that you first buy good quality sausages as they have a lower fat content and don't make the barbie flare up as the fat catches fire and burns the sausages more.My advice is spend that little bit extra and get quality stuff from a good butchers .
don't start cooking till the coals turn white (at the earliest). make sure the barbie's not flaming, extinguish flames with a little jug of water when necessary (it won't put out the coals, just the flames). keep the grid on the highest notch (furthest away from the coals) and cook the sausages as slowly as possible but turning frequently. follow these simple steps and you will the envy of all bbq novices.
We found the easiest way is to buy one of those square mesh racks [see Sainsbury's, Tescos etc] they look similar to this http://www.barbecue-online.co.uk/barbecue_equipmen t/bbq_tools/barbecue_cooking_utensils_baskets.htm
you can get 8 sausages in there, and keep turning them round to get them cooked evenly [following advice byQuatro & quopious]. You may need to undo it and nove them round by a � turn, so's you don't get zebra stripes. Enjoy
A jug of water? get a spray bottle of water (jug may be OTT and put the BBQ out) and spray the coals to cool them (and to put out any fat flare-ups). It's always best to cook the "lowest fat" foodstuffs first (chicken/turkey breast, fish, sweetcorn etc) whilst the coals are hottest, and leave the burgers and sausages till last.
glad we all helped. the main thing is that people tend to start cooking much too quickly, thinking that cos the coals are white then there's little time left to cook with. wait as long as possible (i wait 1 hour after lighting) then start cooking. If you think you haven't got much time left - note how hot the coals still are 2 hours later - you could cook a roast beef on that :-)