Ok, so I ate humble pie with my colleague and Mumsnet wisdom was that I was wrong about the milk going in afterwards in tea
My wonderful Granny told me about the 'sin' of putting milk in first from when I was a very young child and I wondered how I could have got it so wrong?
Then she sent me this from the Telegraph Weekend section :
Take the everyday act of pouring someone a cup of tea. As far as I was taught, the world is divided into those who pour the milk in first and those who pour it in after the tea. If there are three people sitting together and one of them pours the milk in first, the other two will give each other a knowing look. It's a posh version of the Masonic handshake.
And so it goes on..
So I can revert to Granny, I think someone said that milk goes in first if making a singular mug or cup of tea? And second if making a pot? I think I was told that it goes in second, always, because some may take tea without milk? And that's where it sprang from?