Myself, partner and 19 month old daughter are flying with Singapore Airlines on the same flight you mentioned in July. We booked those flights are those were by far the cheapest, even including travelling from Glasgow and an overnight in an airport hotel. Also the shortest journey and with a toddler on our knee we just want to get there as soon as possible.
I have emailed Singapore Airlines on numerous occasions and have found their customer service to be fantastic. We have had confirmation that both my partner and I get double baggage allowance and that we get 10kg for our toddler plus 2 out of buggy/car seat/travel cot. They have also booked us bulkhead seats as we may need a bassinet for our little one and we have booked a meal for a toddler as well.
Obviously we haven't flown yet but if you want to keep in touch I can tell you all about it when I get there. Even have a wee meet when you arrive.