Hi, this is probably a stupid question but thought I would ask any way. I know the guidelines say to get a new cot mattress for each baby but do you also need to get a new mattress for a pushchair carrycot? I've got a new cot mattress already for my second child who, hopefully like the first, will be sleeping in a cot from day one. However I was wondering if I need to buy a replacement mattress for my pram carrycot as well. Any advice would be appreciated, thanks