Here is some useful information on safer bedsharing:
REMEMBER: whether your baby sleeps in a cot or in your bed, they must ALWAYS sleep on their BACK! NOT on their side, and definitely not on their tummy.
http://www.lullabytrust.org.uk/safer-sleep-advice/sleeping-position/
More info at:
http://www.lullabytrust.org.uk/safer-sleep-advice/co-sleeping