Baby bottles

Maybe start introducing cooler bottles to DC so they're used to it at room temp by the time you fly?
When DD was 6 months we flew on holiday and I bought some cartons of formula from Boots the other side of security at the airport, unfortunately though they weren't perforated them & the Air Stewards weren't able to help me open it with anything sharp. Very frustrating but understandable I suppose.

Order a cup of tea, tea bag on the side..

Hot bottle in a thermal bag, by the time you need it should be cool enough to drink but still warm.:?

If she really won’t take ready made at room temperature (this would be easiest and it’s worth trying before you go to see if you can make any headway) then get them made up with hot water from an airport coffee shop just before boarding and they should be a nice warm temperature for her during the flight. Take an insulated bag to keep bottles for later on in the journey as warm as possible.

Oh and don’t do a cup of tea with a bag on the side in flight, this would get messy as you’d be trying to shove a bottle into a full paper cup and also you really shouldn’t use the hot water on the plane for bottles as it can contain bacteria that whilst it’s highly unlike to ever make an adult sick, it’s really not good for babies- this is probably why they’re saying they can’t provide it to you.

You can get on the go warmers, battery powered or like a thermos and have a cafe in the airport fill it.

How awful! Is that information accurate? I've flown some low-cost airlines but no Easy Jet recently and they all helped with milk.

Alternatively, just take a thermos with you. Or hot water/milk in an insulated bottle bag.

I'm with the other posters who have suggested that you try and get your DD onto room temp milk. My DS always liked room temp milk. Was a saviour when we travelled. We went from the uk to Australia when he was 4 months old. Was a doddle with milk cartons. Airline was only too happy to rinse and semi sanitise the bottles under their hot water tap whenever we needed them to. You can raise the temp of carton milk slightly by sticking filled bottle between your thighs for a while (yes really)