I seem to think DS had a mad 8wk thing - I think it was when I had mastitis, so just assumed it was because he was laying nxt to me in bed & could smell me. However, the feedathon went on for a day or 2; seemed like a growth spurt to me, but not a 'universally recognised' one. Perhaps winter babies have an extra growth spurt to get their fat stores up for warmth or something??! 
Thanks for the suggestions PR, Bryzoan Dixie & detective (p.s. I'm amazed you've put up with the sweat so long - yuck!!)
Have only started doing a 'routine' for DS in last little while, & its only been properly working for the last couple of days Clarella - at 6wks, what's the rush?
DD was quite a routine baby -seemed to do roughly the same things every day at roughly the same time - she was quite textbook really. So just decided to start the "bath/dress/book & feed" type routine at her 'usual' bedtime, when I think she was about 9wks (she had started rocking the Moses basket with her kicking, so went into her own room then). We gradually brought it forward so her bedtime was at around 8pm. Until 9wks, I'd mainly been doing the last feed in our bed, with dimmed lights etc.
DS is not as predictable or routine, but is starting to get that way. He tends to want a feed between 7 & 8pm, then gets tired. So now he sometimes has a bath at the same time as DD, then they're both pj'ed up, I read to DD whilst she has her milk whilst DH entertains DS, then I feed him & put him to bed. He only gets a book if he's fed whilst I'm reading to DD.
That's weird & a tiny bit yuck Sophia
only went just under 7hrs last night, possibly because the dream feed was late because I was faffing about on the iPad chatting to DH, getting ready for bed.