In reply to UKC Articles:
Thanks all for the comments and the support, great to see people agree and have found this a useful article!
I would like to clarify the car seat conversation a little as you are both right in that it is NOT an ideal solution, it is suggested as an option and one that worked for us quite a few times. Prolonged periods do indeed lead to further risks and complications and i would in no way advocate leaving them in there for any length of time.
The reason we did originally? She was asleep when we parked, i knew this was my best chance to get some climbing done, while she was napping and the walk in was short enough i wasn't phased about the weight/awkwardness of carrying. It certainly isn't a good option for anything more than a five minute walk in that isn't pushchair friendly.
Critically though it stops them rolling off down the hill and is something you're unlikely to forget. Our second has used a Baby Sleeping Pod and this would solve that problem and could be another option.
However, again, the point raised by jaderosanne regarding sudden infant death syndrome is certainly an important one and whatever method you use to house your infant, make sure you check on them, cuddle and move them and enjoy them being there with you as often as you can.