Thanks for all the replies, didn't expect so many, thanks for the suggestions to help with DC. Sorry for the late reply, OP's found the Phenergan and had a slurp nah been testing it on Mil
.
frippit Yeah I agree there is a lot of pressure on young families to try and please the in laws and grand parents at Xmas. She wont want to come here because she wants the whole family there and I don't have the room at my house.
lulupeg
Thanks for the reply, also tried everything and nothing seems to calm him, I hope this stops by 15 months.
Boxing Day traffic - usually don't travel on boxing day, so not actually sure how much traffic there will be, was assuming that people are leaving or travelling to other families so lots of traffic?
Taking the train - I don't think the trains run on boxing day - just checked national rail and cant see any trains on the 26th. Also would be alot to take with us, not just all the baby stuff but their presents too - they expect presents. They even write gift lists just like that cheeky Mil on the other thread I was reading.
Naptime - baby never naps in the car, if I managed to get him to sleep before we set off he would wake by me putting him in the car seat, he is terrible at napping and difficult to get to sleep.
My username - Knew I should have nc for this, yeah I'm not her biggest fan.
Yeah I am seeing my parents on Christmas day, but they are coming to my house and my Dad will help with alot of the cooking.
No Im not the OP trying to get out of taking the PILs for that Boxing Day lunch because of the FIL who guzzles the wine 
MIL will be fine because she will be learning the word 'no'
Thanks that has cheered me up.
It was a good opportunity for DS to learn a life skill called fucking lump it wish Mil would learn that life skill.
MarilynSlumroe Your mil sounds worse than mine
She emotionally blackmailed us over her own/her mother's illnesses We got the whole "it could be your grans last Christmas blackmail" the first time we were going to spend Christmas with my parents instead of her.
She wants to see her grandchild and most likely you and your DP too she would love it is it was just my DH and DC and I didn't go.
Don't feel sorry for my Mil, she is very overbearing, controlling, and emotionally manipulative. She will use silent treatment, passive progressiveness and emotional blackmail when she doesn't get what she wants.
Threads like this make me dread being a MIL
Think I have learnt how to be a good Mil because of my Mil - I wont do what she does (I won't phone my son when I know my Dil is pushing a baby out her vagina and I wont barge into her bedroom while she is trying to establish breastfeeding talking down to her like a 5 year old saying breastfeeding is just too difficult and should just stop doing it)