hi ive just had delivered my new pram is the mothercare trenton one. its all great apart from the rubbish instruction book. when i fold the pram it dosent seem to lock shut or click or anything so when you pick it up using the carry handle it starts to unfold again. there is nothing in the handbook about this only one really unclear picture. if any one has figured this out i would really appreiciate some help. thanks. lisa x