to realise that my 3 1/2 MO had slept through from 12!! Had to wake him up to relieve the pain 
For some reason he is wanting to do like Gina Ford's routine but different. For last 2 nights he has been taking a feed at 8pm (a small one) then wakes up at about midnight to take a large feed which is enough to keep him going through most of the night.
Tried the whole Gina Ford thing with feeds at bedtime, then a dream feed but he just woke at 4am each time!
Has anyone else had this?