When I was pregnant with O I worried constantly about making sure we would have everything we needed.  I researched, I spoke to friends, I read all the baby magazines about what would be the best brands to buy, what were essentials and what would we probably be able to get away without. It’s only when you become a mum and you start to get to know your baby that you realise what they need and what you will use.  One of our most useless items was the Tommee Tippee bottle warmer, despite being told my someone it would be…