Hi all. Just back from John Lewis getting a few last bits before our first is due in a few weeks. I got chatting to the sales lady who said they would never advise using a sleepyhead mattress inside a snuzpod bedside crib. She said she'd been told this during a training event run by sleepyhead - apparently it's because they say not enough air would circulate around the baby with both in use together. Has anyone else heard this? I was planning on using the sleepyhead in the snuzpod with one side down (attached to our bed) but now I'm not so sure! Any thoughts? Thanks in advance