This is going to sound like a strange one! My last couple of Virgin flights have been on 747s in the bubble and they have been particularly warm (which I never object to as I love the heat). We are due to take our first ever Upper Class flight (really excited) and it's a 346. Do they tend to be on the warm or cold side as this will dictate the layers I wear. We have seats 10a and 11a based on advice on here (thank you) but any other tips that I will find useful.? Thank you 
